Zenji Yatabe

J-GLOBAL         Last updated: Sep 5, 2019 at 18:32
 
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Name
Zenji Yatabe
E-mail
yatabecs.kumamoto-u.ac.jp
URL
https://orcid.org/0000-0003-2069-6677
Affiliation
Kumamoto University
Section
Priority Organization for Innovation and Excellence
Job title
Assistant Professor
Degree
Ph.D. in Biochemistry and Biotechnology(Tokyo University of Agriculture and Technology)
Research funding number
00621773
ORCID ID
0000-0003-2069-6677

Profile

Zenji Yatabe studied at the École normale supérieure de Cachan (ENS Cachan), France from 2005 to 2006 as a Ph.D. student under the Collège doctoral Franco-Japonais (CDFJ) program. He received his Ph.D. degree in Biochemistry and Biotechnology from the Tokyo University of Agriculture and Technology (TUAT), Japan, in 2008. He worked as a Post-doctoral fellow from 2009 to 2010 at the Université de Pau et des Pays de l'Adour (UPPA), France. He joined the Research Center for Integrated Quantum Electronics (RCIQE), Hokkaido University, Sapporo, Japan, in 2011. Since 2015, he has been an Assistant Professor with the Kumamoto University, Kumamoto, Japan. His current research interests include characterization and control of surfaces and interfaces of compound semiconductors.

Research Areas

 
 

Academic & Professional Experience

 
2015
 - 
Today
Assistant Professor, Priority Organization for Innovation and Excellence, Kumamoto University
 
2015
 - 
2015
Specially Appointed Assistant Professor, Research Center for Integrated Quantum Electronics (RCIQE), Hokkaido University
 
2011
 - 
2015
Postdoctoral Fellow, Research Center for Integrated Quantum Electronics (RCIQE), Hokkaido University
 
2009
 - 
2010
Postdoctoral Fellow, Laboratoire des Fluides Complexes et leurs Réservoirs (LFC-R), Université de Pau et des Pays de l'Adour (UPPA)
 

Education

 
2005
 - 
2008
Department of Biochemistry and Biotechnology, The United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology (TUAT)
 
2005
 - 
2006
Collège Doctoral Franco-Japonais, Laboratoire de Photophysique et Photochime Supramoléculaires et Macromoléculaire (PPSM), École normale supérieure de Cachan (ENS Cachan)
 
2003
 - 
2005
Department of Natural Resources and Materials, Graduate School of Agriculture, Tokyo University of Agriculture and Technology (TUAT)
 
1999
 - 
2003
Department of Environmental and Natural Resource Science, Faculty of Agriculture, Tokyo University of Agriculture and Technology (TUAT)
 

Awards & Honors

 
Sep 2016
Characterization of electronic states at insulator/(Al)GaN interfaces for improved insulated gate and surface passivation structures of GaN-based transistors, 38th JSAP Paper AwardThe Japan Society of Applied Physics
Winner: Zenji Yatabe, Yujin Hori, Joel T. Asubar, Masamichi Akazawa, Taketomo Sato, Tamotsu Hashizume
 

Published Papers

 
Zenji Yatabe, Koshi Nishiyama, Takaaki Tsuda, Kazuki Nishimura, Yusui Nakamura
Japanese Journal of Applied Physics   58(7) 070905-1-4   2019   [Refereed]
Aluminum titanium oxide (Al1–xTixOy, an alloy of Al2O3 and TiO2), an attractive high-κ dielectric material, was synthesized by mist chemical vapor deposition, u...
Zenji Yatabe, Koshi Nishiyama, Takaaki Tsuda, Yusui Nakamura
Journal of the Ceramic Society of Japan   127(8) 590-593   2019   [Refereed]
Excellent quality amorphous aluminum oxide (AlOx) thin films have been obtained by atmospheric pressure solution-processed mist chemical vapor deposition (mist-CVD) technique at 400 ºC using water-free solvent. X-ray fluorescence...
Mary Clare S. Escaño, Joel T. Asubar, Zenji Yatabe, Melanie Y. David, Mutsunori Uenuma, Hirokuni Tokuda, Yukiharu Uraoka, Masaaki Kuzuhara, Masahiko Tani
Applied Surface Science   481 1120-1126   2019   [Refereed]
We conducted X-ray photoelectron spectroscopy (XPS) and first-principles calculations based on density functional theory (DFT) to confirm the presence of Ga2O sub-oxide in high-pressure water vapor annealed AlGaN surface. We note that t...
Joel Tacla Asubar, Hirokuni Tokuda, Masaaki Kuzuhara, Zenji Yatabe, Kenya Nishiguchi, Tamotsu Hashizume
PISIKA - Journal of the Physics Society of the Philippines   1(1) 11-1-6   2018   [Refereed]
With its wide bandgap of 3.4 eV, gallium nitride (GaN) is considered as a key semiconductor material for realizing ultra-low-loss power devices. However, GaN-based devices is still plagued by current collapse, which is the temporary reduction of c...
Koshi Okita, Katsuhiko Inaba, Zenji Yatabe, Yusui Nakamura
Japanese Journal of Applied Physics   57(6) 065503-1-7   2018   [Refereed]
ZnS is attractive as a material for low-cost light-emitting diodes. In this study, a non-polar ZnS layer was epitaxially grown on a sapphire substrate by inserting a ZnO buffer layer between ZnS and sapphire. The ZnS and ZnO layers were grown by a...
Zenji Yatabe, Shinya Inoue, Joel T. Asubar, Seiya Kasai
Applied Physics Express   11(3) 031201-1-4   2018   [Refereed]
An analytical technique is proposed to reveal the relaxation time distribution of dynamic charge events using the current noise spectrum of a transistor, by applying an inverse integral transformation to the McWhorter model. In the proposed method...
Tamotsu Hashizume, Kenya Nishiguch, Shota Kaneki, Jan Kuzmik, Zenji Yatabe
Materials Science in Semiconductor Processing   78 85-95   2018   [Refereed][Invited]
Invited Review Article

In this article, we review recent progress on AlGaN/GaN and InAlN/GaN metal-insulator-semiconductor high-electron-mobility transistors (MIS-HEMTs) using Al-based oxides, nitride dielectrics, SiO2 and high-...
R. Stoklas, D. Gregušová, M. Blaho, K. Fröhlich, J. Novák, M. Matys, Z. Yatabe, P. Kordoš, T. Hashizume
Semiconductor Science and Technology   32(4) 045018-1-8   2017   [Refereed]
The electrical properties of AlGaN/GaN MOSHFETs with HfO2 prepared by atomic layer deposition with and w/o oxygen-plasma treatment (further referred to as PHf-MOS and Hf-MOS) were investigated. The sub-threshold slope of the MOSHFETs (3...
Hironobu Tanoue, Masato Takenouchi, Tatsuya Yamashita, Shohei Wada, Zenji Yatabe, Shoji Nagaoka, Yoshihiro Naka, Yusui Nakamura
Physica Status Solidi (a) - Applications and Materials Science   214(3) 1600603-1-5   2017   [Refereed]
The crystal quality of ZnO films grown by mist chemical vapor deposition (mist‐CVD) was improved by introducing ZnO buffer layers on sapphire substrates. The ZnO films were grown by high‐speed rotation‐type mist‐CVD with a ZnCl2 aqueous...
Zenji Yatabe, Takaaki Tsuda, Junya Matsushita, Takehide Sato, Tatsuya Otabe, Koji Sue, Shoji Nagaoka, Yusui Nakamura
Physica Status Solidi (c) - Current Topics in Solid State Physics   14(1-2) 1600148-1-4   2017   [Refereed]
Cover Picture: Phys. Status Solidi C 1–2/2017

Tin dioxide (SnO2) thin films, as a candidate for realizing next‐generation electrical and optical devices, were grown on 2‐inch diameter m ‐plane sapphire substrates by mist ...
M. Matys, B. Adamowicz, A. Domanowska, A. Michalewicz, R. Stoklas, M. Akazawa, Z. Yatabe, T. Hashizume
Journal of Applied Physics   120(22) 225305-1-11   2016   [Refereed]
The energy spectrum of interface state density, Dit(E), was determined at oxide/III-N heterojunction interfaces in the entire band gap, using two complementary photo-electric methods: (i) photo-assisted capacitance-voltage...
Shota Kaneki, Joji Ohira, Shota Toiya, Zenji Yatabe, Joel T. Asubar, Tamotsu Hashizume
Applied Physics Letters   109(16) 162104-1-5   2016   [Refereed]
Interface characterization was carried out on Al2O3/GaN structures using epitaxial n-GaN layers grown on free-standing GaN substrates with relatively low dislocation density (< 3 × 106 cm−2). The Al...
Zenji Yatabe, Joel T. Asubar, Tamotsu Hashizume
Journal of Physics D: Applied Physics   49(39) 393001-1-19   2016   [Refereed][Invited]
Invited Review Article

Recent years have witnessed GaN-based devices delivering their promise of unprecedented power and frequency levels and demonstrating their capability as an able replacement for Si-based devices. High-electron-mobilit...
M. Matys, R. Stoklas, J. Kuzmik, B. Adamowicz, Z. Yatabe, T. Hashizume
Journal of Applied Physics   119(20) 205304-1-7   2016   [Refereed]
We performed, for the first time, quantitative characterization of electron capture cross sections σ of the interface states at dielectric/III-N heterojunction interfaces. We developed a new method, which is based on the photo-assisted capacitance...
Yusuke Kumazaki, Zenji Yatabe, Taketomo Sato
Japanese Journal of Applied Physics   55(4S) 04EJ12-1-5   2016   [Refereed]
We aimed to develop a photoassisted electrochemical etching process for the formation of GaN porous structures. Pore linearity and depth controllability were strongly affected by the anode voltage. In addition, the use of light with an energy belo...
Taketomo Sato, Yusuke Kumazaki, Hirofumi Kida, Akio Watanabe, Zenji Yatabe, Soichiro Matsuda
Semiconductor Science and Technology   31(1) 014012-1-6   2016   [Refereed]
Photoresponse and photoabsorption properties of GaN porous structures were investigated by measuring photocurrent and spectroscopic photoabsorption under monochromatic light with various wavelengths. The measured photocurrents on the porous GaN el...
Joel T. Asubar, Yoshiki Sakaida, Satoshi Yoshida, Zenji Yatabe, Hirokuni Tokuda, Tamotsu Hashizume, Masaaki Kuzuhara
Applied Physics Express   8(11) 111001-1-4   2015   [Refereed]
We studied the effects of pre-passivation oxygen plasma treatment of the AlGaN surface on the current collapse of AlGaN/GaN high-electron-mobility transistors (HEMTs). Oxygen plasma-treated devices generally exhibited significantly less dynamic on...
Taketomo Sato, Hirofumi Kida, Yusuke Kumazaki, Zenji Yatabe
ECS Transactions   69(2) 161-166   2015   [Refereed]
Photoabsorption properties of GaN porous structures were investigated by measuring photocurrent and transmittance under monochromatic light with various wavelengths. The measured photocurrents on the porous GaN electrode were larger than those on ...
Joel T. Asubar, Yohei Kobayashi, Koji Yoshitsugu, Zenji Yatabe, Hirokuni Tokuda, Masahiro Horita, Yukiharu Uraoka, Tamotsu Hashizume, Masaaki Kuzuhara
IEEE Transactions on Electron Devices   62(8) 2423-2428   2015   [Refereed]
We have demonstrated for the first time a remarkable reduction of current collapse in AlGaN/GaN high-electron-mobility transistors (HEMTs) by high-pressure water vapor annealing (HPWVA). The device subjected to HPWVA exhibited considerably low dyn...
Akio Watanabe, Yusuke Kumazaki, Zenji Yatabe, Taketomo Sato
ECS Electrochemistry Letters   4(5) H11-H13   2015   [Refereed]
We investigated the structural features of gallium-nitride-porous structures formed using the photo-assisted electrochemical process in the back-side illumination (BSI) mode. The pore diameter and depth were strongly affected by the direction of i...
Zenji Yatabe, Toru Muramatsu, Joel T. Asubar, Seiya Kasai
Physics Letters A   379(7) 738-742   2015   [Refereed]
A novel method is presented for obtaining the distribution function of relaxation times G(τ) from power spectrum 1/fα (1 ≤ α ≤ 2). It is derived using McWhorter model and its inverse Stieltjes transfor...
Zenji Yatabe, Joel T. Asubar, Taketomo Sato, Tamotsu Hashizume
Physica Status Solidi (a) - Applications and Materials Science   212(5) 1075-1080   2015   [Refereed]
We have investigated the effects of the inductively coupled plasma (ICP) etching of AlGaN surface on the resulting interface properties of the Al2O3/AlGaN/GaN structures. The experimentally measured capacitance–voltage (...
Zenji Yatabe, Yujin Hori, Wan-Cheng Ma, Joel T. Asubar, Masamichi Akazawa, Taketomo Sato, Tamotsu Hashizume
Japanese Journal of Applied Physics   53(10) 100213-1-10   2014   [Refereed]
38th JSAP Paper Award

Spotlights 2014

Selected Topics in Applied Physics, "Progresses and Future Prospects in Nitride Semiconductors"

This paper presents a systematic characterization of electronic states at insu...
Joel T. Asubar, Zenji Yatabe, Tamotsu Hashizume
Applied Physics Letters   105(5) 053510-1-5   2014   [Refereed]
Dramatic reduction of thermal resistance was achieved in AlGaN/GaN Multi-Mesa-Channel (MMC) high electron mobility transistors (HEMTs) on sapphire substrates. Compared with the conventional planar device, the MMC HEMT exhibits much less negative s...
Yusuke Kumazaki, Akio Watanabe, Zenji Yatabe, Taketomo Sato
Journal of The Electrochemical Society   161(10) 705-709   2014   [Refereed]
We investigated the correlation between structural and photoelectrochemical properties of GaN porous nanostructures formed by photo-assisted electrochemical etching. The porous nanostructures were formed during light irradiation of the top-surface...
Tamotsu HASHIZUME, Zenji YATABE, Taketomo SATO
Hyomen Kagaku   35(2) 96-101   2014   [Refereed]
Interface properties of GaN-based heterostructures have been characterized. Schottky contacts on dry-etched n-GaN layers showed leaky I-V characteristics. An anneal process at 400 ºC was effective in recovering the rectifying characteristics. To c...
Y. Hori, Z. Yatabe, T. Hashizume
Journal of Applied Physics   114(24) 244503-1-8   2013   [Refereed]
We have investigated the relationship between improved electrical properties of Al2O3/AlGaN/GaN metal-oxide-semiconductor high-electron-mobility transistors (MOS-HEMTs) and electronic state densities at the...
Ryohei Jinbo, Yusuke Kumazaki, Zenji Yatabe, Taketomo Sato
ECS Transactions   50(37) 247-252   2013   [Refereed]
Schottky interfaces were formed on InP porous structures by the electrodeposition of Pt films. The coverage of the Pt film and its optical reflectance depended largely on the surface morphology of the porous structure. Removal of the irregular top...
Yusuke Kumazaki, Tomohito Kudo, Zenji Yatabe, Taketomo Sato
Applied Surface Science   279 116-120   2013   [Refereed]
We investigated the optical absorption properties of InP porous structures formed by the electrochemical process using photoelectric conversion (PC) devices formed on p–n junction substrates. The photocurrent measurements revealed that the current...
Zenji Yatabe, Yujin Hori, Sungsik Kim, Tamotsu Hashizume
Applied Physics Express   6(1) 016502-1-4   2013   [Refereed]
The effects of the inductively coupled plasma (ICP) etching of AlGaN on the interface properties of the Al2O3/AlGaN/GaN structures prepared by atomic layer deposition were investigated. It was found from the photoassisted cap...
Toru Muramatsu, Kensuke Miura, Yuta Shiratori, Zenji Yatabe, Seiya Kasai
Japanese Journal of Applied Physics   51(6S) 06FE18-1-5   2012   [Refereed]
Low-frequency noise in SiNx insulator–gate GaAs-based etched nanowire field-effect transistors (FETs) is investigated, focusing on the device size dependence and the effect of electron traps in the insulator. Intensity of the dra...
Ryohei Jinbo, Tomohito Kudo, Zenji Yatabe, Taketomo Sato
Thin Solid Films   520(17) 5710-5714   2012   [Refereed]
A photoelectric-conversion device—based on an InP porous structure utilizing the large surface area inside pores and the low reflectance on the porous surface—is proposed. The InP walls inside the pores are covered with thin platinum films that fo...
Junko Kamiguri, Noriko Tsuchiya, Ruri Hidema, Zenji Yatabe, Masahiko Shoji, Chihiro Hashimoto, Robert Bernard Pansu, Hideharu Ushiki
BIOPHYSICS   8 11-19   2012   [Refereed]
The contraction process of living Vorticella sp. in polymer solutions with various viscosities has been investigated by image processing using a high-speed video camera. The viscosity of the external fluid ranges from 1 to 5 mPa·s for diffe...
Junko Kamiguri, Noriko Tsuchiya, Ruri Hidema, Masatoshi Tachibana, Zenji Yatabe, Masahiko Shoji, Chihiro Hashimoto, Robert Bernard Pansu, Hideharu Ushiki
BIOPHYSICS   8 1-9   2012   [Refereed]
The contraction process of living Vorticella sp. has been investigated by image processing using a high-speed video camera. In order to express the temporal change in the stalk length resulting from the contraction, a damped spring model an...
Ruri Hidema, Zenji Yatabe, Masahiko Shoji, Chihiro Hashimoto, Robert Pansu, Gabriel Sagarzazu, Hideharu Ushiki
Experiments in Fluids   49(3) 725-732   2010   [Refereed]
Two-dimensional turbulence in flowing soap films with polymer additives is analyzed by image analysis. The power spectra of the interference patterns of turbulent soap films are calculated. The scaling exponent of the power spectrum is −5/3 for po...
Zenji Yatabe, Ruri Hidema, Chihiro Hashimoto, Robert Bernard Pansu, Hideharu Ushiki
Chemical Physics Letters   475(1-3) 101-104   2009   [Refereed]
The formation process of onion structure in a quaternary mixture, which consists of water, NaCl, octanol and sodium dodecyl sulfate, has been investigated by two-dimensional light scattering under oscillatory shear flow. In our experiment, we inve...
Zenji Yatabe, Yasufumi Miyake, Masatoshi Tachibana, Chihiro Hashimoto, Robert Pansu, Hideharu Ushiki
Chemical Physics Letters   456(1-3) 31-35   2008   [Refereed]
The formation process of onion structure in a quaternary mixture made of water, NaCl, octanol and sodium dodecyl sulphate, have been investigated by two dimensional light scattering under various shear rates. In this Letter, we investigated the si...
Serge Desportes, Zenji Yatabe, Sébastien Baumlin, Valérie Génot, Jean-Pierre Lefèvre, Hideharu Ushiki, Jacques Alexis Delaire, Robert Bernard Pansu
Chemical Physics Letters   446(1-3) 212-216   2007   [Refereed]
A 3D hydrodynamic focusing microreactor was used to observe the in situ nanocrystallization of rubrene by fluorescence lifetime imaging (FLIM). The crystallization is achieved by a precipitation method based on the addition of a non-solvent. The r...

Misc

 
Yudai Tanaka, Yuki Nagao, Takumi Furukawa, Zenji Yatabe, Koji Sue, Nagaoka Shoji, Yusui Nakamura
Proceedings of the Engineering Workshop 2018      2018
Takumi Furukawa, Masato Takenouchi, Yudai Tanaka, Koji Sue, Shoji Nagaoka, Zenji Yatabe, Yusui Nakamura
Proceedings of the Engineering Workshop 2018      2018
K. Nishiyama, K. Nishimura, T. Tsuda, Z. Yatabe, K. Sue, Y. Nakamura
Proceedings of the Engineering Workshop 2018      2018
Thant Zin Win, Takumi Furukawa, Yudai Tanaka, Koshi Okita, Kensuke Minami, Koji Sue, Zenji Yatabe, Yusui Nakamura
Proceedings of the Engineering Workshop 2018      2018
BEST PRESENTATION AWARD
Zenji Yatabe, Hironobu Tanoue, Koshi Okita, Masato Takenouchi, Takahiro Ishida, Takaaki Tsuda, Tomoki Mikuriya, Shoji Nagaoka, Koji Sue, Yusui Nakamura
Proceedings of the 35th Samahang Pisika ng Pilipinas Physics Conference   35(1) INV-1B-01-1-4   2017   [Invited]
Invited
Joel T. Asubar, Hirokuni Tokuda, Masaaki Kuzuhara, Zenji Yatabe, Kenya Nishiguchi, Tamotsu Hashizume
Proceedings of the 34th Samahang Pisika ng Pilipinas Physics Congress   34 INV-1B-01-1-4   2016   [Invited]
Invited
Hironobu Tanoue, Tatsuya Yamashita, Shohei Wada, Zenji Yatabe, Shoji Nagaoka, Yusui Nakamura
2016 Compound Semiconductor Week (CSW) [Includes 28th International Conference on Indium Phosphide & Related Materials (IPRM) & 43rd International Symposium on Compound Semiconductors (ISCS)   MoP-ISCS-103   2016
Tatsuya Otabe, Takehide Sato, Junya Matsushita, Zenji Yatabe, Koji Sue, Shoji Nagaoka, Yusui Nakamura
2016 Compound Semiconductor Week (CSW) [Includes 28th International Conference on Indium Phosphide & Related Materials (IPRM) & 43rd International Symposium on Compound Semiconductors (ISCS)   MoP-ISCS-101   2016
Hirofumi Kida, Yusuke Kumazaki, Zenji Yatabe, Taketomo Sato
IEICE technical report. Electron devices   115(170) 51-54   2015
Zenji Yatabe, Tamotsu Hashizume
IEICE technical report. Silicon Device and Materials   115(108) 1-4   2015   [Invited]
Invited Lecture
Effects of surface charging and interface states on current stability of GaN HEMTs
T. Hashizume, Z. Yatabe, K. Nishiguchi
Proceedings of the 39th Workshop on Compound Semiconductor Devices and Integrated Circuits (WOCSDICE 2015)   51-54   2015
Yusuke Kumazaki, Akio Watanabe, Zenji Yatabe, Taketomo Sato
IEICE technical report. Electron devices   115(63) 63-66   2015
Yusuke Kumazaki, Akio Watanabe, Zenji Yatabe, Taketomo Sato
IEICE technical report. Electron devices   113(329) 113-116   2013
Yusuke Kumazaki, Ryohei Jinbo, Zenji Yatabe, Taketomo Sato
IEICE technical report. Electron devices   113(39) 61-64   2013
Yujin Hori, Zenji Yatabe, Wan-Cheng Ma, Tamotsu Hashizume
IEICE technical report. Electron devices   112(327) 37-40   2012
Zenji Yatabe, Yujin Hori, Sungsik Kim, Tamotsu Hashizume
Proceedings of the 36th Workshop on Compound Semiconductor Devices and Integrated Circuits (WOCSDICE 2012)   24-25   2012
Zenji Yatabe, Yujin Hori, Sungsik Kim, Tamotsu Hashizume
IEICE technical report. Electron devices   112(32) 49-52   2012
Toru Muramatsu, Seiya Kasai, Zenji Yatabe
IEICE technical report. Electron devices   111(425) 89-93   2012
Sungsik Kim, Yujin Hori, Zenji Yatabe, Tamotsu Hashizume
IEICE technical report. Electron devices   111(290) 25-28   2011
Zenji Yatabe, Chihiro Hashimoto, Robert Pansu, Hideharu Ushiki
Proceedings of the 8th Asian Thermophysical Properties Conference (ATPC 2007)   Paper No. 081    2007
Ruri Hidema, Zenji Yatabe, Chihiro Hashimoto, Robert Pansu, Hideharu Ushiki
Proceedings of the 8th Asian Thermophysical Properties Conference (ATPC 2007)   Paper No. 079    2007

Conference Activities & Talks

 
Zenji Yatabe, Koshi Nishiyama, Kazuki Nishimura, Yusui Nakamura
2019 International Conference on Solid State Devices and Materials (SSDM2019)   4 Sep 2019   The Japan Society of Applied Physics
Zenji Yatabe, Joel T. Asubar, Seiya Kasai
13th Topical Workshop on Heterostructure Microelectronics (TWHM 2019)   26 Aug 2019   
Zenji Yatabe, Koshi Nishiyama, Kazuki Nishimura, Yusui Nakamura
13th Topical Workshop on Heterostructure Microelectronics (TWHM 2019)   26 Aug 2019   
Zenji Yatabe, Koshi Nishiyama, Takaaki Tsuda, Kazuki Nishimura, Yusui Nakamura
Compound Semiconductor Week 2019 (CSW2019)   21 May 2019   
Thant Zin Win, Takumi Furukawa, Yudai Tanaka, Koshi Okita, Koji Sue, Zenji Yatabe, Yusui Nakamura
Compound Semiconductor Week 2019 (CSW2019)   21 May 2019   
Zenji Yatabe, Koshi Nishiyama, Takaaki Tsuda, Kazuki Nishimura, Yusui Nakamura
Compound Semiconductor Week 2019 (CSW2019)   21 May 2019   
H. Takahashi, H. Hidema, Z. Yatabe, H. Suzuki
The 46th Annual Meeting of SRJ   8 May 2019   The Society of Rheology, Japan
Kazuki Nishimura, Koshi Nishiyama, Yuki Fujimoto, Zenji Yatabe, Yusui Nakamura
The 66th JSAP Spring Meeting   12 Mar 2019   The Japan Society of Applied Physics
Yuki Nagao, Yudai Tanaka, Koji Sue, Syoji Nagaoka, Zenji Yatabe, Yusui Nakamura
The 66th JSAP Spring Meeting   10 Mar 2019   The Japan Society of Applied Physics
Thant Zin Win, Takumi Furukawa, Yudai Tanaka, Koshi Okita, Koji Sue, Zenji Yatabe, Yusui Nakamura
The 66th JSAP Spring Meeting   9 Mar 2019   The Japan Society of Applied Physics
Thant Zin Win, Takumi Furukawa, Yudai Tanaka, Koshi Okita, Kensuke Minami, Koji Sue, Zenji Yatabe, Yusui Nakamura
The 3rd Asian Applied Physics Conference (Asian-APC)   8 Dec 2018   JSAP Kyushu Chapter
J. Kikukawa, Y. Kishigawa, Y. Tanaka, S. Nagaoka, Z. Yatabe, K. Sue, Y. Nakamura
JSAP Kyushu Chapter Annual Meeting 2018   8 Dec 2018   JSAP Kyushu Chapter
K. Nishimura, K. Nishiyama, T. Tsuda, Z. Yatabe, K. Sue, Y. Nakamura
JSAP Kyushu Chapter Annual Meeting 2018   8 Dec 2018   JSAP Kyushu Chapter
Y. Nagao, Y. Tanaka, Z. Yatabe, K. Sue, S. Nagaoka, Y. Nakamura
JSAP Kyushu Chapter Annual Meeting 2018   8 Dec 2018   JSAP Kyushu Chapter
Zin Win, Takumi Furukawa, Yudai Tanaka, Koshi Okita, Kensuke Minami, Koji Sue, Zenji Yatabe, Yusui Nakamura
13th International Student Conference on Advanced Science and Technology 2018 (ICAST 2018)   28 Nov 2018   
Thant Zin Win, Takumi Furukawa, Yudai Tanaka, Koshi Okita, Kensuke Minami, Koji Sue, Zenji Yatabe, Yusui Nakamura
2018 ENGINEERING WORKSHOP in Kumamoto   16 Nov 2018   
BEST PRESENTATION AWARD
Yudai Tanaka, Yuki Nagao, Takumi Furukawa, Zenji Yatabe, Koji Sue, Nagaoka Shoji, Yusui Nakamura
2018 ENGINEERING WORKSHOP in Kumamoto   16 Nov 2018   
Takumi Furukawa, Masato Takenouchi, Yudai Tanaka, Koji Sue, Shoji Nagaoka, Zenji Yatabe, Yusui Nakamura
2018 ENGINEERING WORKSHOP in Kumamoto   16 Nov 2018   
K. Nishiyama, K. Nishimura, T. Tsuda, Z. Yatabe, K. Sue, Y. Nakamura
2018 ENGINEERING WORKSHOP in Kumamoto   16 Nov 2018   
Yudai Tanaka, Hironobu Tanoue, Yuki Nagao, Takumi Furukawa, Shoji Nagaoka, Zenji Yatabe, Yusui Nakamura
The 79th JSAP Autumn Meeting   20 Sep 2018   The Japan Society of Applied Physics
Tomotaka Kido, Tomoki Mikuriya, Rena Sugino, Yasutaka Nishi, Makoto Nakazumi, Koichiro Iwahori, Zenji Yatabe, Takao Namihira, Yusui Nakamura
The 79th JSAP Autumn Meeting   20 Sep 2018   The Japan Society of Applied Physics
Kousi Nishiyama, Kazuki Nishimura, Takaaki Tsuda, Qiang Yin, Zenji Yatabe, Kouji Sue, Yusui Nakamura
The 79th JSAP Autumn Meeting   20 Sep 2018   The Japan Society of Applied Physics
Yudai Tanaka, Hironobu Tanoue, Masato Takenouchi, Yuki Nagao, Zenji Yatabe, Shoji Nagaoka, Yusui Nakamura
The 1st International Workshop on the Research and Development of Unique Reaction/Separation Techniques in Kumamoto   6 Mar 2018   
T. Tsuda, K. Nishiyama, Z. Yatabe, K. Sue, Y. Nakamura
JSAP Kyushu Chapter Annual Meeting 2017   2 Dec 2017   JSAP Kyushu Chapter
T. Ishida, K. Minami, K. Okita, K. Sue, S. Nagaoka, Z. Yatabe, Y. Nakamura
JSAP Kyushu Chapter Annual Meeting 2017   2 Dec 2017   JSAP Kyushu Chapter
K. Okita, T. Goto, Y. Tanaka, M. Takenouchi, Z. Yatabe, Y. Nakamura
2017 International Conference on Solid State Devices and Materials (SSDM2017)   21 Sep 2017   The Japan Society of Applied Physics
Masato Takenouchi, Syohei Wada, Hironobu Tanoue, Naoya Honogo, Shoji Nagaoka, Zenji Yatabe, Yusui Nakamura
The 78th JSAP Autumn Meeting   7 Sep 2017   The Japan Society of Applied Physics
Yudai Tanaka, Hironobu Tanoue, Masato Takenouchi, Shoji Nagaoka, Zenji Yatabe, Yusui Nakamura
The Japan Society of Applied Physics   7 Sep 2017   The Japan Society of Applied Physics
Koshi Okita, Hironobu Tanoue, Taiki Goto, Yudai Tanaka, Shoji Nagaoka, Zenji Yatabe, Yusui Nakamura
The 78th JSAP Autumn Meeting   5 Sep 2017   The Japan Society of Applied Physics
Z. Yatabe, T. Tsuda, J. Matsushita, Y. Nakamura
12th Topical Workshop on Heterostructure Microelectronics (TWHM 2017)   31 Aug 2017   
Shota Kaneki, Zeniji Yatabe, Tamotsu Hashizume
12th Topical Workshop on Heterostructure Microelectronics (TWHM 2017)   29 Aug 2017   
Zenji Yatabe, Hironobu Tanoue, Koshi Okita, Masato Takenouchi, Takahiro Ishida, Takaaki Tsuda, Tomoki Mikuriya, Shoji Nagaoka, Koji Sue, Yusui Nakamura
35th Samahang Pisika ng Pilipinas Physics Conference and Annual Meeting (SPP 2017)   7 Jun 2017   Samahang Pisika ng Pilipinas
Invited Subplenary Talk
Zenji Yatabe
Physics Dept. hosts talk on semiconductors   6 Jun 2017   Department of Physics, Mapúa University
Invited Lecture
Koshi Okita, Hironobu Tanoue, Taiki Goto, Yudai Tanaka, Shoji Nagaoka, Zenji Yatabe, Yusui Nakamura
The 64th JSAP Spring Meeting   17 Mar 2017   The Japan Society of Applied Physics
Tomoki Mikuriya, Hirotaka Ogawa, Tomotaka Kido, Zenji Yatabe, Yasutaka Nishi, Masaru Nakazumi, Koichiro Iwahori, Kei Nara, Takao Namihira, Yusui Nakamura
The 64th JSAP Spring Meeting   14 Mar 2017   The Japan Society of Applied Physics
T. Tsuda, T. Sato, J. Matsushita, T. Otabe, Z. Yatabe, K. Sue, S. Nagaoka, Y. Nakamura
JSAP Kyushu Chapter Annual Meeting 2016   3 Dec 2016   JSAP Kyushu Chapter
H. Ogawa, T. Mikuriya, K. Minami, Z. Yatabe, Y. Nishi, M. Nakazumi, K. Iwahori, K. Nara, T. Namihira, Y. Nakamura
JSAP Kyushu Chapter Annual Meeting 2016   3 Dec 2016   JSAP Kyushu Chapter
Z. Yatabe, J. T. Asubar, Y. Nakamura, T. Hashizume
2016 International Conference on Solid State Devices and Materials (SSDM2016)   28 Sep 2016   The Japan Society of Applied Physics
Koshi Okita, Kensuke Minami, Satomi Teraya, Shoji Nagaoka, Zenji Yatabe, Yusui Nakamura
The 77th JSAP Autumn Meeting   16 Sep 2016   The Japan Society of Applied Physics
Zenji Yatabe, Yujin Hori, Wan-Cheng Ma, Joel T. Asubar, Masamichi Akazawa, Taketomo Sato, Tamotsu Hashizume
The 77th JSAP Autumn Meeting   14 Sep 2016   The Japan Society of Applied Physics
Invited Talk (JSAP Paper Award Speech)
Joel T. Asubar, Hirokuni Tokuda, Masaaki Kuzuhara, Zenji Yatabe, Kenya Nishiguchi, Tamotsu Hashizume
34thSPP Physics Conference and Annual Meeting (SPP 2016)   18 Aug 2016   Samahang Pisika ng Pilipinas
Sub-plenary Talk
Hironobu Tanoue, Tatsuya Yamashita, Shohei Wada, Zenji Yatabe, Shoji Nagaoka, Yusui Nakamura
2016 Compound Semiconductor Week (CSW2016)   27 Jun 2016   The Japan Society of Applied Physics, IEEE
Tatsuya Otabe, Takehide Sato, Junya Matsushita, Zenji Yatabe, Koji Sue, Shoji Nagaoka, Yusui Nakamura
2016 Compound Semiconductor Week (CSW2016)   27 Jun 2016   The Japan Society of Applied Physics, IEEE
Hironobu Tanoue, Shohei Wada, Tatsuya Yamashita, Shoji Nagaoka, Zenji Yatabe, Yusui Nakamura
The 63rd JSAP Spring Meeting   20 Mar 2016   The Japan Society of Applied Physics
Maciej Matys, Boguslawa Adamowicz, Roman Stoklas, Masamichi Akazawa, Zenji Yatabe, Tamotsu Hashizume
2015 MRS Fall Meeting & Exhibit   3 Dec 2015   Materials Research Society
Yusuke Kumazaki, Zenji Yatabe, Taketomo Sato
2015 MRS Fall Meeting & Exhibit   3 Dec 2015   Materials Research Society
Tamotsu Hashizume, Zenji Yatabe
2015 International Workshop on DIELECTRIC THIN FILMS FOR FUTURE ELECTRON DEVICES - SCIENCE AND TECHNOLOGY - (2015 IWDTF)   3 Nov 2015   
Invited Talk
T. Sato, Y. Kumazaki, Z. Yatabe
228th ECS Meeting   13 Oct 2015   The Electrochemical Society
Y. Kumazaki, T. Sato, Z. Yatabe
2015 International Conference on Solid State Devices and Materials (SSDM2015)   30 Sep 2015   The Japan Society of Applied Physics
Akio Nishimura, Zenji Yatabe, Masahiko Shoji, Chihiro Hashimoto, Masao Takayanagi, Hideharu Ushiki
64th Symposium on Macromolecules   17 Sep 2015   The Society of Polymer Science, Japan
Masaaki Edamoto, Yusuke Kumazaki, Zenji Yatabe, Taketomo Sato
The 76th JSAP Autumn Meeting   15 Sep 2015   The Japan Society of Applied Physics
Yusuke Kumazaki, Sayaka Ohmi, Zenji Yatabe, Taketomo Sato
The 76th JSAP Autumn Meeting   14 Sep 2015   The Japan Society of Applied Physics
Hirofumi Kida, Yusuke Kumazaki, Zenji Yatabe, Taketomo Sato
The 76th JSAP Autumn Meeting   14 Sep 2015   The Japan Society of Applied Physics
Sayaka Omi, Yusuke kumazaki, Zenji Yatabe, Taketomo Sato
The 76th JSAP Autumn Meeting   13 Sep 2015   The Japan Society of Applied Physics
Sayaka Omi, Yusuke Kumazaki, Zenji Yatabe, Taketomo Sato
11th Topical Workshop on Heterostructure Microelectronics (TWHM 2015)   26 Aug 2015   
Hirofumi Kida, Yusuke Kumazaki, Zenji Yatabe, Taketomo Sato
11th Topical Workshop on Heterostructure Microelectronics (TWHM 2015)   26 Aug 2015   
Masaaki Edamoto, Yusuke Kumazaki, Zenji Yatabe, Taketomo Sato, Tamotsu Hashizume
11th Topical Workshop on Heterostructure Microelectronics (TWHM 2015)   26 Aug 2015   
Taketomo Sato, Yusuke Kumazaki, Zenji Yatabe
11th Topical Workshop on Heterostructure Microelectronics (TWHM 2015)   26 Aug 2015   
Invited Talk
Joel T. Asubar, Yoshiki Sakaida, Satoshi Yoshida, Zenji Yatabe, Hirokuni Tokuda, Tamotsu Hashizume, Masaaki Kuzuhara
11th Topical Workshop on Heterostructure Microelectronics (TWHM 2015)   26 Aug 2015   
Zenji Yatabe, Joji Ohira, Taketomo Sato, Tamotsu Hashizume
11th Topical Workshop on Heterostructure Microelectronics (TWHM 2015)   24 Aug 2015   
Joji Ohira, Yutaka Senzaki, Zenji Yatabe, Tamotsu Hashizume
11th Topical Workshop on Heterostructure Microelectronics (TWHM 2015)   24 Aug 2015   
Hirofumi Kida, Yusuke Kumazaki, Zenji Yatabe, Taketomo Sato
IEICE Technical Committee on Electron Device   4 Aug 2015   The Institute of Electronics, Information and Communication Engineers/The Institute of Electrical Engineers of Japan
Characterization and Control of Insulated Gate Interfaces for Normally-Off AlGaN/GaN HEMTs [Invited]
Zenji Yatabe, Tamotsu Hashizume
2015 Compound Semiconductor Week (CSW 2015)   2 Jul 2015   UCSB, MIT
Invited Talk
Influence of the Oxygen-Plasma Treatment on the AlGaN/GaN MOSHFETs with HfO2 by ALD to Reduce Leakage Current
Roman Stoklas, Dagmar Gregušová, Michal Blaho, Karol Fröhlich, Jozef Novák, Peter Kordoš, Maciek Matys, Zenji Yatabe, Tamotsu Hashizume
2015 Compound Semiconductor Week (CSW 2015)   29 Jun 2015   UCSB, MIT
T. Hashizume, Z. Yatabe
2015 Asia-Pacific Workshop on Fundamentals and Applications of Advanced Semiconductor Devices (AWAD2015)   29 Jun 2015   The Institute of Electronics and Information Engineers, Brain Korea 21, IEICE Electronics Society
Invited Talk
Zenji Yatabe, Tamotsu Hashizume
IEICE Technical Committee on Silicon Device and Materials   19 Jun 2015   The Institute of Electronics, Information and Communication Engineers/Silicon Technology Division, The Japan Society of Applied Physics
Invited Lecture
Effects of surface charging and interface states on current stability of GaN HEMTs
T. Hashizume, Z. Yatabe, K. Nishiguchi
39th Workshop on Compound Semiconductor Devices and Integrated Circuits (WOCSDICE 2015)   9 Jun 2015   Slovak University of Technology in Bratislava
Invited Talk
Yusuke Kumazaki, Akio Watanabe, Zenji Yatabe, Taketomo Sato
IEICE Technical Committee on Electron Device   29 May 2015   The Institute of Electronics, Information and Communication Engineers
Akio Nishimura, Zenji Yatabe, Masahiko Shoji, Chihiro Hashimoto, Masao Takayanagi, Hideharu Ushiki
64th SPSJ Annual Meeting   28 May 2015   The Society of Polymer Science, Japan
Tamotsu Hashizume, Zenji Yatabe
2015 MRS Spring Meeting & Exhibit   8 Apr 2015   Materials Research Society
Invited Talk
Zenji Yatabe, Joji Ohira, Taketomo Sato, Tamotsu Hashizume
The 62nd JSAP Spring Meeting   11 Mar 2015   The Japan Society of Applied Physics
Yohei Kobayashi, Joel T. Asubar, Koji Yoshitsugu, Zenji Yatabe, Hirokuni Tokuda, Masahiro Horita, Yukiharu Uraoka, Tamotsu Hashizume, Masaaki Kuzuhara
The 62nd JSAP Spring Meeting   11 Mar 2015   The Japan Society of Applied Physics
Joji Ohira, Yutaka Senzaki, Zenji Yatabe, Tamotsu Hashizume
The 62nd JSAP Spring Meeting   11 Mar 2015   The Japan Society of Applied Physics
Yusuke Kumazaki, Sayaka Ohmi, Zenji Yatabe, Taketomo Sato
The 62nd JSAP Spring Meeting   11 Mar 2015   The Japan Society of Applied Physics
Akio Watanabe, Yusuke Kumazaki, Zenji Yatabe, Taketomo Sato
50th JSAP Hokkaido Chapter Annual Meeting   10 Jan 2015   Hokkaido Chapter, The Japan Society of Applied Physics
Yutaka Senzaki, Zenji Yatabe, Tamotsu Hashizume
50th JSAP Hokkaido Chapter Annual Meeting   10 Jan 2015   Hokkaido Chapter, The Japan Society of Applied Physics
Akio Watanabe, Yusuke Kumazaki, Zenji Yatebe, Taketomo Sato
The 7th International Symposium on Surface Science (ISSS-7)   3 Nov 2014   The Surface Science Society of Japan
T. Sato, A. Watanabe, Y. Kumazaki, Z. Yatabe
2014 ECS and SMEQ Joint International Meeting   8 Oct 2014   The Electrochemical Society
Akio Watanabe, Yusuke Kumazaki, Zenji Yatabe, Taketomo Sato
2014 Fall Meeting   27 Sep 2014   The Electrochemical Society of Japan
Hirokazu Maruoka, Zenji Yatabe, Masahiko Shoji, Chihiro Hashimoto, Hideharu Ushiki
63rd Symposium on Macromolecules   26 Sep 2014   The Society of Polymer Science, Japan
Akio Nishimura, Zenji Yatabe, Masahiko Shoji, Chihiro Hashimoto, Masao Takayanagi, Hideharu Ushiki
63rd Symposium on Macromolecules   26 Sep 2014   The Society of Polymer Science, Japan
Yoichiro Odanagi, Masamichi Akazawa, Joel T. Asubar, Zenji Yatabe, Tamotsu Hashizume
The 75th JSAP Autumn Meeting   19 Sep 2014   The Japan Society of Applied Physics
Yusuke Kumazaki, Akio Watanabe, Zenji Yatabe, Taketomo Sato
The 75th JSAP Autumn Meeting   18 Sep 2014   The Japan Society of Applied Physics
Taketomo Sato, Yusuke Kumazaki, Akio Watanabe, Zenji Yatabe
The 75th JSAP Autumn Meeting   17 Sep 2014   The Japan Society of Applied Physics
Invited Talk
M. Matys, Z. Yatabe, Y. Hori, T. Hashizume, B. Adamowicz
International Workshop on Nitride Semiconductors (IWN 2014)   27 Aug 2014   
Yusuke Kumazaki, Akio Watanabe, Zenji Yatabe, Taketomo Sato
International Workshop on Nitride Semiconductors (IWN 2014)   27 Aug 2014   
Zenji Yatabe, Taketomo Sato, Tamotsu Hashizume
International Workshop on Nitride Semiconductors (IWN 2014)   27 Aug 2014   
Invited Talk
Akio Watanabe, Yusuke Kumazaki, Zenji Yatabe, Taketomo Sato
The 6th IEEE International Nanoelectronics Conference (IEEE INEC 2014)   30 Jul 2014   IEEE Electron Devices Society
Taketomo Sato, Yusuke Kumazaki, Akio Watanabe, Zenji Yatabe
The 6th IEEE International Nanoelectronics Conference (IEEE INEC 2014)   30 Jul 2014   IEEE Electron Devices Society
Invited Talk
Akio Nishimura, Zenji Yatabe, Masahiko Shoji, Chihiro Hashimoto, Hideharu Ushiki
63rd SPSJ Annual Meeting   30 May 2014   The Society of Polymer Science, Japan
Hirokazu Maruoka, Zenji Yatabe, Masahiko Shoji, Chihiro Hashimoto, Hideharu Ushiki
63rd SPSJ Annual Meeting   30 May 2014   The Society of Polymer Science, Japan
Zenji Yatabe, Yujin Hori, Tamotsu Hashizume
The 61st JSAP Spring Meeting   17 Mar 2014   The Japan Society of Applied Physics
Yujin Hori, Zenji Yatabe, Tamotsu Hashizume
SiC and Related Materials Researches 22nd Conference   10 Dec 2013   Professional Group of Advanced Power Semiconductors, The Japan Society of Applied Physics
Invited Lecture
Akio Watanabe, Yusuke Kumazaki, Zenji Yatabe, Taketomo Sato
49th JSAP Hokkaido Chapter Annual Meeting   9 Dec 2013   Hokkaido Chapter, The Japan Society of Applied Physics
Yusuke Kumazaki, Akio Watanabe, Zenji Yatabe, Taketomo Sato
IEICE Technical Committee on Electron Device   29 Nov 2013   The Institute of Electronics, Information and Communication Engineers
Taketomo Sato, Yusuke Kumazaki, Ryohei Jinbo, Zenji Yatabe
224th ECS Meeting   30 Oct 2013   The Electrochemical Society
Yusuke Kumazaki, Akio Watanabe, Zenji Yatabe, Taketomo Sato
224th ECS Meeting   29 Oct 2013   The Electrochemical Society
Yujin Hori, Zenji Yatabe, Tamotsu Hashizume
The 74th JSAP Autumn Meeting   20 Sep 2013   The Japan Society of Applied Physics
Akio Watanabe, Yusuke Kumazaki, Zenji Yatabe, Taketomo Sato
The 74th JSAP Autumn Meeting   19 Sep 2013   The Japan Society of Applied Physics
Yusuke Kumazaki, Akio Watanabe, Zenji Yatabe, Taketomo Sato
The 74th JSAP Autumn Meeting   16 Sep 2013   The Japan Society of Applied Physics

Research Grants & Projects

 
Japan Society for the Promotion of Science (JSPS): Challenging Research (Exploratory)
Project Year: Jun 2019 - Mar 2022    Investigator(s): Ruri Hidema
Japan Society for the Promotion of Science (JSPS): Grant-in-Aid for Scientific Research (C)
Project Year: Apr 2019 - Mar 2022    Investigator(s): Zenji Yatabe
Japan Society for the Promotion of Science (JSPS): Grant-in-Aid for Young Scientists (B)
Project Year: Apr 2015 - Mar 2018    Investigator(s): Zenji Yatabe
Japan Society for the Promotion of Science (JSPS): Grant-in-Aid for Scientific Research (B)
Project Year: Apr 2013 - Mar 2016    Investigator(s): Taketomo Sato
Morphological Formation Process of Onion Structure of Water/Oil/Surfactant System under Programmable Shear Flow
Consortium japonais du Collège doctoral franco-japonais: Collège doctoral franco-japonais (CDFJ)
Project Year: Sep 2005 - Aug 2006    Investigator(s): Zenji Yatabe

Mountaineering

 
Aug 2001   summited Muztagh Ata (7,509 m)
Ryoichi Okabayashi, Mikio Miyamoto, Yukuto Katsuragi, Nobuo Mizuno, Junji Oguchi, Zenji Yatabe
Tokyo University of Agriculture and Technology Alpine Club (TUATAC)
https://sites.google.com/site/tuatacarchive/home