496 citations · 1.2k across the 10 of their papers we have counts for
10 papers
Landau-Zener tunneling problem for Bloch states
Ryuji Takahashi, Naoyuki Sugimoto
We study the Landau-Zener tunneling problem for particles bound in periodic lattice insulators. To this end, we construct the path integral based on the Bloch and Wannier functions…
Current control of systems with a Peierls distortion by magnetic field
Ryuji Takahashi, Naoyuki Sugimoto
We study the tunneling phenomenon of a ladder system with a Peierls distortion in a magnetic flux, and the response of electrons the insulator is investigated when the tunneling cu…
Semiclassical Lattice effects on interband tunneling of a two-state system
Ryuji Takahashi, Naoyuki Sugimoto
Previously, we have shown that the transition probability of the Landau-Zener problem in periodic lattice systems becomes large by taking into account the nonlinearity of the energ…
Conservation law in noncommutative geometry -- Application to spin-orbit coupled systems
Naoyuki Sugimoto, Naoto Nagaosa
The quantization scheme by noncommutative geometry developed in string theory is applied to establish the conservation law of twisted spin and spin current densities in the spin-or…
Field-induced metal-insulator transition and switching phenomenon in correlated insulators
Naoyuki Sugimoto, Shigeki Onoda, Naoto Nagaosa
We study the nonequilibrium switching phenomenon associated with the metal-insulator transition under electric field E in correlated insulator by a gauge-covariant Keldysh formalis…
Quantum transport theory of anomalous electric, thermoelectric, and thermal Hall effects in ferromagnets
Shigeki Onoda, Naoyuki Sugimoto, Naoto Nagaosa
The mechanism of the anomalous Hall transport phenomena, if it is of the intrinsic or extrinsic origin, has been controversial. We present a unified theory of them for ferromagneti…