Researcher Introduction
Elements Strategy Initiative for Catalysts and Batteries, Kyoto University Project Researcher Hiroki Kotaka

Motivation for Becoming a Researcher

I first became interested in computational physics during a class at the university in which we were performing computer simulations to reproduce physical phenomena. I was amazed at how the movement of atoms and molecules could be represented visually. Moreover, I had always had a passion for programming and aspired to become a computational scientist with the aim of improving my programming skills.

Your Greatest Strengths

I have expertise in calculating crystal structures of various shapes and atomic species and I am familiar with the methods of simulation. I also have experience developing programs in such programming languages as C and Python and have worked on improving the code for first-principles calculations.

What Makes Your Research Interesting or Worthwhile

I reproduce and predict the properties of materials on computers, but my research sometimes produces unexpected results. It gives me great satisfaction when I can come up with reasonable explanations for these unintended results. I also study programming languages in an effort to improve computation programs. I feel a sense of accomplishment in my work when I can create a more convenient and useful program.

Other Research That Interests You

I would like to search for useful material candidates through computational research. For example, I would like to try to predict electrode materials with high energy density using first-principles calculations. To accomplish this, it is necessary to obtain calculation results that can reproduce the experiment with high accuracy.

Interests Other Than Research You Would Like to Pursue

I am interested in trying winter sports, such as skiing and snowboarding.

Hiroki Kotaka

Elements Strategy Initiative for Catalysts and Batteries, Kyoto University Project Researcher

Principal Work History:

May 2016 – Present Kyoto University, Kyoto, Japan
Position: Project Researcher of Elements Strategy Initiative for Catalysts and Batteries
Apr 2015 – Apr 2016 Institute of Scientific and Industrial Research, Osaka University, Osaka, Japan
Position: Specially Appointed Researcher
Apr 2013 – Mar 2015 Kanazawa University, Kanazawa, Japan
Position: Postdoctoral Researcher

Driver’s license

Notable Articles:

  • [1] S. Souma, Z. Wang, H. Kotaka, T. Sato, K. Nakayama, Y. Tanaka, H. Kimizuka, T. Takahashi, K. Yamauchi, T. Oguchi, K. Segawa, and Y. Ando. “Direct observation of nonequivalent Fermi-arc states of opposite surfaces in the noncentrosymmetric Weyl semimetal NbP.” Phys. Rev. B 93 (2016): 161112(R).
  • [2] H. Kotaka, F. Ishii, and M. Saito. “Rashba Effect on the Structure of the Bi One-Bilayer Film: Fully Relativistic First-Principles Calculation.” Jpn. J. Appl. Phys., 52 (2013): 035204.

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