Haruhiko DEKURA

J-GLOBAL         Last updated: Nov 13, 2019 at 17:09
 
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Name
Haruhiko DEKURA
Nickname
Haru-Physics_Mofy
Affiliation
Ehime University
Section
Geodynamics Research Center
Job title
Lecturer
Degree
Doctor of Science(Osaka University)
Research funding number
90700146

Research Areas

 

Academic & Professional Experience

 
Apr 2016
 - 
Today
Lecturer, Geodyamics Research Center, Ehime University
 
Jan 2013
 - 
Mar 2016
Assistant Professor, Geodyamics Research Center, Ehime University
 
Apr 2010
 - 
Dec 2012
Postdoctoral Fellow, Senior Research Fellow Center, Ehime University
 
Mar 2010
   
 
Postdoctoral Fellow, Material Science Theory, Ecole polytechnique
 

Education

 
 
 - 
2010
Department of Physics, Graduate School of Science, Osaka University
 
 
 - 
2005
Department of Physics, Faculty of Science,, Chuo University
 

Awards & Honors

 
Nov 2015
Outstanding reviewer award in Solid State Communications
 
Jul 2014
Outstanding reviewer award in Material Science in Semiconductor processing
 
Sep 2011
Scientist Presentation Award from The GL-GRC Inter-Institutional Science Symposium
 

Published Papers

 
Lattice thermal conductivity of MgSiO3 postperovskite under the lowermost mantle conditions from ab initio anharmonic lattice dynamics
Haruhiko Dekura, Taku Tsuchiya
Geophysical Research Letters   46, in press    2019   [Refereed]
Haruhiko Dekura, Taku Tsuchiya
Physical Review B   18(95) 184303   May 2017
Lattice thermal conductivity κlat of MgO at high pressures P and temperatures T up to 150 GPa and 4000 K are determined using lattice dynamics calculations and the linearized phonon Boltzmann transport equation (BTE) beyond the relaxation time app...
Structure and stability of pseudo-cubic tetragonal boron
Koun Shirai, Naoki Uemura, Haruhiko Dekura
Japanese Journal of Applied Physics   56 05FB05   Apr 2017   [Refereed]
Takeshi Sakai, Haruhiko Dekura, Naohisa Hirao
Scientific Reports   6    Mar 2016
The MgSiO3 post-perovskite phase is the most abundant silicate phase in a super-Earth's mantle, although it only exists within the Earth's lowermost mantle. In this study, we established the thermal equation of state (EoS) of the MgSiO3 post-perov...
Daisuke Nishio-Hamane, Haruhiko Dekura, Yusuke Seto, Takehiko Yagi
Physics and Chemistry of Minerals   42 385-392   May 2015
© 2014, Springer-Verlag Berlin Heidelberg.A post-cotunnite phase transition in zirconia (ZrO<inf>2</inf>) at high pressure was investigated by synchrotron X-ray diffraction measurements and ab initio calculations based on density functional theory...
Haruhiko Dekura, Taku Tsuchiya, Jun Tsuchiya
Physical Review Letters   110    Jan 2013
The lattice thermal conductivity (κlat) of MgSiO 3 perovskite (Mg-Pv) under high-pressure and high-temperature conditions was computed based on the ab initio anharmonic lattice dynamics method with the density functional perturbation theory. κlat ...
H. Dekura, K. Shirai, A. Yanase
Physical Review B - Condensed Matter and Materials Physics   84 -DH000155   Sep 2011
Li doping is a promising method for achieving metallization of α-rhombohedral boron (α-boron for short), which is a potential candidate for a high-Tc superconducting material. Toward this end, a serious drawback has been the difficulty of doping α...
Koun Shirai, Haruhiko Dekura, Yoshihisa Mori, Yutaka Fujii, Hiroshi Hyodo, Kaoru Kimura
Journal of the Physical Society of Japan   80    Aug 2011
Recently, it has been shown that, like β-rhombohedral boron (β-boron), α-rhombohedral boron (α-boron) exhibits superconductivity at high pressure. The transition pressure is similar to that of β-boron, that is, about 160 GPa. This paper presents a...
Haruhiko Dekura, Taku Tsuchiya, Yasuhiro Kuwayama, Jun Tsuchiya
Physical Review Letters   107    Jul 2011
We report the discovery of a post-cotunnite phase of TiO2 by both density-functional ab initio calculations and high-pressure experiments. A pressure-induced phase transition to a hexagonal Fe2P-type structure (space group P6̄2m) was predicted to ...
Haruhiko Dekura, Taku Tsuchiya, Jun Tsuchiya
Physical Review B - Condensed Matter and Materials Physics   83    Apr 2011
Two high-pressure phase transitions in GeO2 have been discovered through first-principles computer simulations: the first is a transition from the pyrite-type (FeS2) to cotunnite-type (α-PbCl2) structure predicted to occur at a pressure of ∼300 GP...
H. Werheit, V. Filipov, K. Shirai, H. Dekura, N. Shitsevalova, U. Schwarz, M. Armbrüster
Journal of Physics Condensed Matter   23    Feb 2011
The Raman spectra of numerous dodecaborides have been measured on high-quality single crystals at ambient conditions with high spectral resolution and signal-to-noise ratio. Besides the strong Raman-active modes, numerous Raman-inactive modes occu...
Nobuya Nakae, Jun Ishisada, Haruhiko Dekura, Koun Shirai
Journal of Physics: Conference Series   215    May 2010
Recent discovery of a compound BC5, whose structure is most likely diamond, invoked intensive interests in the superconductivity research. Little is known not only for its properties but for the preparation methods. For synthesizing BC5, it is ver...
Haruhiko Dekura, Koun Shirai, Akira Yanase
Journal of Physics: Conference Series   215    May 2010
Electronic structure of semiconducting boron carbide at high pressure has been theoretically investigated, because of interests in the positive pressure dependence of resistivity, in the gap closure, and in the phase transition. The most simplest ...
H. Dekura, K. Shirai, A. Yanase
Journal of Computational and Theoretical Nanoscience   6 2629-2634   Dec 2009
An accurate calculation method for Fermi surfaces is presented in order to study the electronic doping effect to semiconductor a-boron. Given the eigenvalues of energy at a limited set of k points, the present interpolation method retains the orig...
Koun Shirai, Haruhiko Dekura, Akira Masago
Journal of Physics: Conference Series   176    Sep 2009
Boron solids are, similar to diamond, strong electron-phonon coupling systems and therefore potentially have high-Tc superconductivity. For realizing high transition temperature Tc, however, careful control of the valence electrons is necessary, w...
Haruhiko Dekura, Koun Shirai, Akira Yanase
Journal of Physics: Conference Series   176    Sep 2009
A theoretical assessment of doping α-boron with hydrogen is presented aiming at high Tc superconductor. Dissimilar to other impurities, hydrogen is unique because T site is the most stable site. This position is well suited to the three-center bon...
Haruhiko Dekura, Koun Shirai, Akira Yanase
Journal of Physics: Conference Series   176    Sep 2009
Recently, we have shown by density functional theory calculations that α-boron is the most stable phase at low temperature among icosahedron-based boron crystals. This is consistent with low-temperature crystal growth of α-boron. A problem of the ...
Koun Shirai, Haruhiko Dekura, Akira Yanase, Akira Yanase
Journal of the Physical Society of Japan   78    Aug 2009
Recently, it has been discovered that the semiconductor α-boron becomes metallic at high pressures and finally undergoes a superconducting transition at 160 GPa, without causing any phase transition. Before the superconducting transition, a step i...
Koun Shirai, Haruhiko Dekura, Akira Yanase
Physica Status Solidi (B) Basic Research   246 673-678   Mar 2009
Use of a high-pressure process is proposed for synthesizing highly doped semiconductors. Working on a real example in a recent experiment by Ekimov on B-doped diamond synthesis, a theoretical investigation has been made of an efficient doping meth...
H. Dekura, K. Shirai, H. Katayama-Yoshida
Physica B: Condensed Matter   401-402 702-705   Dec 2007
Theoretical investigation has been made for the possibility of efficient doping to α boron, aiming at superconducting application. The idea is that application of high pressure makes it easier to dope soft impurities to stiff host crystals. Along ...
J. Ishisada, K. Shirai, H. Dekura, H. Katayama-Yoshida
Journal of Physics: Conference Series   92    Dec 2007
Recently, an elastic softening at low temperatures has been observed in Si by an ultrasonic measurement. By assuming that an intrinsic defect of vacancy causes this softening, which is suggested by the experiment, the effects of monovacancy on the...
K. Shirai, H. Dekura, H. Katayama-Yoshida
Journal of Physics: Conference Series   92    Dec 2007
It is believed that hydrogen in silicon is located at the bond center. But, the hydrogen atom is actually deviated significantly from the bond center dynamically, which is illustrated by the present calculations. The fast relaxation to bending cau...
Haruhiko Dekura, Koun Shirai, Hiroshi Katayama-Yoshida, Hiroshi Katayama-Yoshida
Journal of Physics Condensed Matter   19    Sep 2007
It was previously predicted that doping Li into semiconducting boron (α-rhombohedral) brought metallic character to the matrix and possibility a high-Tc superconductor. However, experiments show that Li doping of α-rhombohedral boron is difficult....
Ab Initio Study on the Lower Mantle Minerals
Taku Tsuchiya, Jun Tsuchiya, Haruhiko Dekura, Sebastian Ritterbex
Annual Review of Earth and Planetary Sciences   48, in press    [Refereed]

Conference Activities & Talks

 
Effects of iron on the lattice thermal conductivity of lower mantle minerals evaluated by Ab initio anharmonic lattice dynamics simulations
Haruhiko DEKURA
23 May 2018   
Ab initio lattice thermal conductivity of MgSiO3 post-perovskite
Haruhiko DEKURA
22 May 2018   
First-Principles Investigation of Thermal Transport Property of Earth's Lowermost Mantle [Invited]
Haruhiko DEKURA
SIAM Conference on Parallel Processing for Scientific Computing   10 Mar 2018   
Ab initio lattice thermal conductivity of MgO using a full solution to the linearized Boltzmann transport equation
Haruhiko DEKURA
日本地球惑星科学連合2017年大会   21 May 2017   
Ab initio anharmonic lattice dynamics calculations for Fe-bearing lower mantle minerals
Haruhiko DEKURA
20 May 2017   
Thermal conductivity of lower mantle minerals from ab initio anharmonic lattice dynamics
Haruhiko DEKURA, Taku TSUCHIYA
Goldschmidt 2016   27 Jun 2016   
Thermal conductivity of lower mantle minerals from ab initio anharmonic lattice dynamics
Haruhiko DEKURA, Taku TSUCHIYA
23 May 2016   
Electron-phonon contribution to electrical resistivity of hcp Fe
Haruhiko DEKURA, Taku TSUCHIYA
日本地球惑星科学連合2016年大会   23 May 2016   
Thermal conductivity of lower mantle minerals from ab initio anharmonic lattice dynamic
Haruhiko DEKURA, Taku TSUCHIYA
2016 International Conference on the Earth's Deep Interior   
Ab initio lattice thermal conductivity
Haruhiko DEKURA
Special seminar 2016, Institute of solid state physics, Chinese Academiy of science   

Research Grants & Projects

 
Ab initio electron transport property under the Earth's inner core conditions
Ministry of Education, Culture, Sports, Science and Technology: Grants-in-Aid for Scientific Research (若手研究 (B)): 
Project Year: Apr 2014 - Mar 2016    Investigator(s): Haruhiko DEKURA