Computational Materials Science Research Team

The main purpose of our research is to develop new numerical methods to understand new quantum states of matter in a wide range of quantum many-body systems, including solid state materials, nano-sized matters, and cold atoms. Using various numerical techniques, we study emergent quantum phenomena that appear as a result of collective, many-body effects. To make the most of the full power of RIKEN's K computer, we are developing new numerical algorithms and computational codes for quantum systems in general. For the next several years, our main focus will be on (i) materials design for strongly correlated materials, (ii) searching for new quantum states of matter in many-body quantum systems, and (iii) developing new numerical methods, algorithms, and computational codes for strongly correlated quantum systems.

Research Subjects

• Strongly correlated quantum systems
• Development of new numerical simulation methods for quantum many-body model systems

Publications

1. S. Sorella, Y. Otsuka, and S. Yunoki:
   "Absence of a Spin Liquid Phase in the Hubbard Model on the Honeycomb Lattice"
   Scientific Reports, 2, 992 (2012)
2. H. Lu, S. Sota, H. Matsueda, J. Bonca, and T. Tohyama:
   "Enhanced Charge Order in a Photoexcited One-Dimensional Strongly Correlated System"
   Phys. Rev. Lett. 109, 197401 (2012)
3. S. Zhang, S. Yamagiwa, M. Okumura, and S. Yunoki:
   "Kernel polynomial method on GPU"
   Int. J. Parallel Prog. 41, 59 (2013)
4. Q. Zhang, S. Dong, B. Wang, and S. Yunoki:
   "Strain-engineered magnetic order in (LaMnO3)n/(SrMnO3)2n superlattices"
   Phys. Rev. B 86, 094403 (2012)
5. H. Watanabe, T. Shirakawa, and S. Yunoki:
   "Monte Carlo study of an unconventional superconducting phase in Iridium oxide Jeff = 1/2 Mott insulators induced by carrier doping"
   Phys. Rev. Lett. 110, 027002 (2013)