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Intermediate Low Spin States in a Few-electron Quantum Dot in the Regime
Y. Nishi, P. A. Maksym, D. G. Austing +4
We study the effects of electron-electron interactions in a circular few-electron vertical quantum dot in such a strong magnetic field that the filling factor . We measure…
Superconductivity from a long-range interaction: a crossover between the electron gas and the lattice model
Seiichiro Onari, Ryotaro Arita, Kazuhiko Kuroki +1
We explore how the superconductivity arising from the on-site electron-electron repulsion will change when the repulsion is changed to a long-ranged, 1/r-like one by introducing an…
Density-matrix renormalization group study of pairing when electron-electron and electron-phonon interactions coexist: effect of the electronic band structure
Masaki Tezuka, Ryotaro Arita, Hideo Aoki
Density-matrix renormalization group is used to study the pairing when both of electron-electron and electron-phonon interactions are strong in the Holstein-Hubbard model at half-f…
The spin-triplet superconductivity induced by the charge fluctuation in extended Hubbard model
Seiichiro Onari, Ryotaro Arita, Kazuhiko Kuroki +1
The pairing symmetry in the electron mechanism for superconductivity is explored when charge fluctuations coexist with spin fluctuations. The extended Hubbard model is adopted to o…
Nonlinear Transport in One-Dimensional Mott Insulator in Strong Electric Fields
Takashi Oka, Ryotaro Arita, Hideo Aoki
Time-dependent Schroedinger's equation is integrated for a one-dimensional strongly-correlated electron system driven by large electric fields. For larger electric fields, many-bod…
Ground-State Decay Rate for the Zener Breakdown in Band and Mott Insulators
Takashi Oka, Hideo Aoki
Non-linear transport of electrons in strong electric fields, as typified by dielectric breakdown, is re-formulated in terms of the ground-state decay rate originally studied by Sch…