WATANABE Satoshi

J-GLOBAL         Last updated: Apr 24, 2019 at 12:02
 
Avatar
Name
WATANABE Satoshi
Affiliation
The University of Tokyo
Section
The Graduate School of Engineering
Job title
Professor
Degree
(BLANK)(The University of Tokyo), (BLANK)(The University of Tokyo)

Research Areas

 
 

Academic & Professional Experience

 
Mar 2008
 - 
2015
Professor, Department of Materials Engineering, School fo Engineering, The University of Tokyo
 
Apr 1997
 - 
Feb 2008
Associate Professor, Department of Materials Engineering, School fo Engineering, The University of Tokyo
 
Oct 1994
 - 
Mar 1997
Visiting researcher, Advanced Research Laboratory, Hitachi, Ltd.
 
1994
 - 
1997
Visiting Researcher, Advanced Research Laboratory, Hitachi, Ltd.
 
Dec 1989
 - 
Sep 1994
Researcher, Aono Atomcraft Project, Research Development Corporation of Japan
 

Education

 
 
 - 
1989
Graduate School, Division of Science, The University of Tokyo
 
 
 - 
1984
Faculty of Science, The University of Tokyo
 

Published Papers

 
Bo Xiao and Satoshi Watanabe
ACS Applied Materrial & Interfaces   7 519-525   2015   [Refereed]
Daisuke Hirai, Daisuke Hirai, Takahiro Yamamoto, Satoshi Watanabe
Applied Physics Letters   105 173106   Oct 2014   [Refereed]
© 2014 AIP Publishing LLC. The increasing need for nanodevices has necessitated a better understanding of the electronic transport behavior of nanomaterials. We therefore theoretically examine the AC transport properties of metallic carbon nanotub...
Daisuke Hirai, Daisuke Hirai, Takahiro Yamamoto, Satoshi Watanabe
Journal of Applied Physics   115(17) 174312   May 2014   [Refereed]
AC response of defective metallic carbon nanotubes is investigated from first principles. We found that capacitive peaks appear at electron scattering states. Moreover, we show that satellite inductive peaks are seen adjacent to a main capacitive ...
Bo Xiao, Tingkun Gu, Tomofumi Tada, Tomofumi Tada, Satoshi Watanabe
Journal of Applied Physics   115(3) 034503-1-034503-7   Feb 2014   [Refereed]
We have examined the structure of Cu filaments in Cu/amorphous-Ta 2O5 (a-Ta2O5)/Pt atomic switch from first principles. We have found that the Cu single atomic chains are unstable during the molecular dynamics (MD) simulation and thus cannot work ...
Qi Wang, Qi Wang, Yaomi Itoh, Yaomi Itoh, Tohru Tsuruoka, Tohru Tsuruoka, Tsuyoshi Hasegawa, Tsuyoshi Hasegawa, Satoshi Watanabe, Satoshi Watanabe, Shu Yamaguchi, Shu Yamaguchi, Toshiro Hiramoto, Toshiro Hiramoto, Masakazu Aono
Key Engineering Materials   596 111-115   Jan 2014   [Refereed]
A redox-based three-terminal device was fabricated using Ta 2O5 as the ionic transfer material, and its operation was investigated. We found that application of a negative polarity gate bias, which increases oxygen anions in the channel regions, c...
Yoshikazu Ito, Yoshikazu Ito, Kazuyuki Takai, Akira Miyazaki, Vajiravelu Sivamurugan, Manabu Kiguchi, Yoshihiro Ogawa, Naotake Nakamura, Suresh Valiyaveettil, Tomofumi Tada, Tomofumi Tada, Satoshi Watanabe, Toshiaki Enoki
Physical Chemistry Chemical Physics   16 288-296   Jan 2014   [Refereed]
We investigated the electron transport in Co-Pd ferromagnetic nanoparticles (Co 16%) cross-linked with oligo(phenyleneethynylene)diethanethiolate, which consists of three rotary phenylene moieties bridged by two acetylene groups, or icosane-1,20-d...
Kenji Sasaoka, Kenji Sasaoka, Takahiro Yamamoto, Satoshi Watanabe
Japanese Journal of Applied Physics   53(11) 115203   Jan 2014   [Refereed]
© 2014 The Japan Society of Applied Physics. We simulate transient currents in a quantum dot weakly coupled with two ferromagnetic electrodes using non-equilibrium Green's function technique under wide band limit and Hartree approximations. In our...
Bo Xiao and Satoshi Watanabe
Nanoscale   6 10169-10178   2014   [Refereed]
Manabu Kiguchi, Junichi Inatomi, Yuuta Takahashi, Ryota Tanaka, Takafumi Osuga, Takashi Murase, Makoto Fujita, Tomofumi Tada, Tomofumi Tada, Satoshi Watanabe
Angewandte Chemie - International Edition   52 6202-6205   Jun 2013   [Refereed]
Ion nanowire: Electron transport through discrete gold-ion arrays within coordination cages was directly measured between Au nanogap electrodes (see picture) using STM. Precise calibration of the electron transport distance demonstrates that Au-io...
Qi Wang, Qi Wang, Yaomi Itoh, Yaomi Itoh, Tsuyoshi Hasegawa, Tsuyoshi Hasegawa, Tohru Tsuruoka, Tohru Tsuruoka, Shu Yamaguchi, Satoshi Watanabe, Toshiro Hiramoto, Masakazu Aono
Applied Physics Letters   102(23) 233508   Jun 2013   [Refereed]
Nonvolatile three-terminal operation is demonstrated using a Pt/Ta 2O5-x/Pt, Pt structure, by controlling oxygen vacancy drift to make/annihilate a conductive channel between a source and a drain. The as-fabricated device is in an off-state. Appli...
Kenji Sasaoka, Takahiro Yamamoto, Satoshi Watanabe
Applied Physics Letters   102(23) 233107-1-233107-4   Jun 2013   [Refereed]
We investigate effects of switching speed of a bias voltage on a time-dependent current in a quantum dot with a single energy level, weakly coupled with two electrodes. Our simulations based on non-equilibrium Green's function formalism show that ...
Jun Terao, Akihisa Wadahama, Akitoshi Matono, Tomofumi Tada, Tomofumi Tada, Satoshi Watanabe, Shu Seki, Tetsuaki Fujihara, Yasushi Tsuji
Nature Communications   4 1691-1-1691-9   May 2013   [Refereed]
The feasibility of using π-conjugated polymers as next-generation electronic materials is extensively studied; however, their charge mobilities are lower than those of inorganic materials. Here we demonstrate a new design principle for increasing ...
Wei Liu, Kenji Sasaoka, Takahiro Yamamoto, Tomofumi Tada, Satoshi Watanabe
Journal of Applied Physics   113(12) 123701-1-123701-9   Mar 2013   [Refereed]
We present a theoretical study on inelastic transient electrical currents and the effects of phonon heating in a single-level quantum dot system weakly coupled to a localized vibration degree of freedom, using the nonequilibrium Greens function me...
Hidehiro Asai, Satoshi Watanabe
Physica C: Superconductivity and its Applications   485 125-131   Feb 2013   [Refereed]
We have studied the dynamics of vortices interacting with periodic planar pinning arrays using molecular dynamics simulation. We consider three types of periodic pinning arrays consisting of long (L) and short (S) pinning intervals. Current-voltag...
Derek Ashley Thomas, Takahiro Yamamoto, Tomofumi Tada, and Ssatoshi Watanabe
Transactions of Materials Research Society of Japan   38 183-186   2013   [Refereed]
Shusuke Kasamatsu, Tomofumi Tada, Satoshi Watanabe
Solid State Ionics   226 62-70   Oct 2012   [Refereed]
© 2012 Elsevier B.V. All rights reserved. The space charge formation at metal/yttria-stabilized zirconia interface is investigated by combining defect formation energies from first principles with a parallel-sheets model. In this model, the crysta...
Wei Liu, Kenji Sasaoka, Takahiro Yamamoto, Takahiro Yamamoto, Tomofumi Tada, Satoshi Watanabe
Japanese Journal of Applied Physics   51(9) 094303-1-094303-6   Sep 2012   [Refereed]
We derive a nonequilibrium Green's function formalism to study the transient energy currents carried by electrons in a single-level quantum dot system sandwiched between two electrodes. The energy current shows the same relaxation time and oscilla...
Takahiro Yamamoto, Kenji Sasaoka, Satoshi Watanabe
Japanese Journal of Applied Physics   51(4) 045104-1-045104-5   Apr 2012   [Refereed]
We theoretically investigate the emittance and dynamic dissipation of a nanoscale interconnect consisting of a metallic single-walled carbon nanotube using the non-equilibrium Green's function technique for AC electronic transport. We show that th...
Daisuke Hirai, Takahiro Yamamoto, Satoshi Watanabe
Japanese Journal of Applied Physics   51(4) 04DN01-1-04DN01-5   Apr 2012   [Refereed]
The sub-THz AC response of metallic single-walled carbon nanotubes (M-SWNTs) with a single atomic vacancy is investigated theoretically focusing on its diameter dependence. We find that the AC response behaves more capacitively in large-diameter M...
Manabu Kiguchi, Shigeto Nakashima, Tomofumi Tada, Satoshi Watanabe, Susumu Tsuda, Yasushi Tsuji, Jun Terao
Small   8 726-730   Mar 2012   [Refereed]
An electronic conductance with small fluctuations, which is stipulated in single-molecule junctions, is necessary for the precise control of single-molecule devices. However, the suppression of conductance fluctuations in conventional molecular ju...

Misc

 
Theoretical calculations of STM images of the Si(111)√3×√3-Ag and Sb surfaces(jointly worked)
Surface Science   287(288/) 1036   1993

Books etc

 
"Theoretical Calculations of Electrical Properties of Nanoscale Systems Under the Influence of Electric Fields and Currents" in Chemistry of Nanomolecular Systems - Towards the Realization of Nanomolecular Devices
Springer-Verlag   2003   

Conference Activities & Talks

 
MORI YUTARO, MINAMITANI EMI, ANDO YASUNOBU, KASAMATSU SHUNSUKE, KANAYAMA KAORU, NAGASHIO KOSUKE, WATANABE SATOSHI
日本物理学会講演概要集   22 Aug 2014   

Works

 
Visual observation and control of physical phenomena under local high electric field
1997 - 2002
Development of simulators for nano-scale measurements of materials properties
2002

Research Grants & Projects

 
Theoretical Calculation on scanning probe microscopy images
JST Basic Research Programs (Core Research for Evolutional Science and Technology :CREST)
Project Year: 1989 - 2007
Theoretical calculation on adsorbed atoms and molecules on semiconductor surfaces
Grant-in-Aid for Scientific Research
Project Year: 1999 - 2005
Theoretical calculation on electrical properties of nanostuctures in an electric field
JST Basic Research Programs (Core Research for Evolutional Science and Technology :CREST)
Project Year: 1998 - 2007

Patents

 
Atomic wire and atomic wire switch
U.S. Patent 6,114,762
Ferromagnetic material and magnetic apparatus employing the ferromagnetic material
U.S. Patent 5,968,677