28 citations · 117 across the 7 of their papers we have counts for
7 papers
Tunable electronic correlation effects in nanotube-light interactions
Yuhei Miyauchi, Zhengyi Zhang, Mitsuhide Takekoshi +9
Electronic many-body correlation effects in one-dimensional (1D) systems such as carbon nanotubes have been predicted to modify strongly the nature of photoexcited states. Here we…
Excitonic BCS-BEC crossover at finite temperature: Effects of repulsion and electron-hole mass difference
Yuh Tomio, Kotaro Honda, Tetsuo Ogawa
The BCS to Bose-Einstein condensation (BEC) crossover of electron-hole (e-h) pairs in optically excited semiconductors is studied using the two-band Hubbard model with both repulsi…
Phase diagram for the exciton Mott transition in infinite-dimensional electron-hole systems
Yuh Tomio, Tetsuo Ogawa
To understand the essence of the exciton Mott transition in three-dimensional electron-hole systems, the metal-insulator transition is studied for a two-band Hubbard model in infin…
Role of Collective Mode for Optical Conductivity and Reflectivity in Quarter-Filled Spin-Density-Wave State
Yuh Tomio, Yoshikazu Suzumura
Taking account of a collective mode relevant to charge fluctuation, the optical conductivity of spin-density-wave state has been examined for an extended Hubbard model with one-dim…
Effect of nearest- and next-nearest neighbor interactions on the spin-wave velocity of one-dimensional quarter-filled spin-density-wave conductors
Y. Tomio, N. Dupuis, Y. Suzumura
We study spin fluctuations in quarter-filled one-dimensional spin-density-wave systems in presence of short-range Coulomb interactions. By applying a path integral method, the spin…
Role of Phase Variables in Quarter-Filled Spin Density Wave States
Yuh Tomio, Yoshikazu Suzumura
Several kinds of spin density wave (SDW) states with both quarter-filled band and dimerization are reexamined for a one-dimensional system with on-site, nearest-neighbor and next-n…
Quarter-filled spin density wave states with long-range Coulomb interaction
Yuh Tomio, Yoshikazu Suzumura
Spin density wave (SDW) states at quarter-filling, which coexist with charge density wave (CDW) states, have been examined where the critical temperature is calculated for an exten…