Takuma Ohashi Japanese
condensed matter theory laboratory, RIKEN
2-1 Hirosawa, Wako, Saitama 351-0198
Chemistry and
e-mail: t-ohashi [atmark] riken.jp
Research interests
Metal-insulator transition,
magnetism, superconductivity in strongly correlated electron systems:
geometrical frustration, orbital degrees of freedom, etc.
Quantum transport and many-body
problem in nanoscopic systems:
orbital Kondo effects in quantum dot systems, etc.
Publications
Non-Crossing
Approximation Study of Multi-Orbital Kondo Effect in Quantum Dot Systems
Tomoko Kita, Rui Sakano, Takuma Ohashi, Sei-ichiro Suga
cond-mat/0605285
Magnetic
correlations around the Mott transition in the Kagome lattice Hubbard model
Takuma Ohashi, Sei-ichiro Suga, Norio Kawakami, Hirokazu Tsunetsugu
Journal of
Physics: Condensed Matter, Vol. 19, 145251 (2007)
Anomalous
magnetic properties near Mott transition in Kagome lattice Hubbard model
Takuma Ohashi, Sei-ichiro Suga, Norio Kawakami, Hirokazu Tsunetsugu
J. Mag. Mag. Mater. 310, 879 (2007)
Transport properties
of the orbital Kondo effect via quantum dot systems with plural electrons
R. Sakano, T. Kita, T. Ohashi, S. Suga, and N. Kawakami
Phys. Stat.
Sol. (a) 204, 492 (2007)
Modulation of
three-orbital Kondo effect in quantum dots
Tomoko Kita, Rui Sakano, Takuma Ohashi, Sei-ichiro Suga
Phys. Stat.
Sol. (C) 3, 4338 (2006)
Mott
Transition in Kagomé Lattice Hubbard Model
T. Ohashi, N. Kawakami, and H. Tsunetsugu
Physical Review Letters. Vol. 97, 066401 (2006)
Mott Transition in
Kagomé Lattice Hubbard Model, T. Ohashi, N.
Kawakami, and H. Tsunetsugu
Phys. Rev. Lett. 97, 066401 (2006)
This letter was chosen for the cover of Phys.
Rev. Lett. Vol. 97, No. 6 (2006).
Magnetic properties
of a Kondo insulator with RKKY interaction: Extended dynamical mean field study
T. Ohashi, S. Suga, and N. Kawakami
Journal of
Physics: Condensed Matter, Vol. 17, 4547 (2005)
Field-induced
phase transition in the periodic
T. Ohashi, A. Koga, S. Suga and N. Kawakami
Physica B 359,
738 (2005)
Field-induced
phase transitions in a Kondo insulator
T. Ohashi, A. Koga, S. Suga, and N. Kawakami
Physical
Review B, Vol. 70, 245104 (2004)
Periodic
R. Sato, T. Ohashi, A. Koga, and N. Kawakami
Journal of
Physical Society of
Non-Fermi-liquid
properties in disordered Kondo systems
S. Suga and T. Ohashi
Journal of
Physics: Condensed Matter Vol. 15, S2219 (2003)
Effects of
degenerate orbitals on the Hubbard model
A. Koga, T. Ohashi, Y. Imai, S. Suga, and N. Kawakami
Journal of
Physical Society of
Kondo effect
in low-dimensional disordered systems
T. Ohashi and S. Suga
Physica B
329-333, 1275 (2003)
Kondo effect
in two-dimensional disordered electron systems
S. Suga and T. Ohashi
Journal of
Physical Society of
Susceptibility
of a magnetic impurity in two-dimensional disordered electron systems
T. Ohashi and S. Suga
Journal of
Physical Society of