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Relationship between spiral and ferromagnetic states in the Hubbard model in the thermodynamic limit
Ryotaro Arita, Hideo Aoki
We explore how the spiral spin(SP) state, a spin singlet known to accompany fully-polarized ferromagnetic (F) states in the Hubbard model, is related with the F state in the thermo…
Magnetic properties of the Hubbard model on three-dimensional lattices: fluctuation-exchange and two-particle self-consistent studies
Ryotaro Arita, Shigeki Onoda, Kazuhiko Kuroki +1
The relation between three-dimensional lattice structure and magnetism in correlated electron systems is explored for face centered cubic (FCC), body centered cubic (BCC), and simp…
d- and p-wave superconductivity mediated by spin fluctuations in two- and three-dimensional single-band repulsive Hubbard model
Ryotaro Arita, Kazuhiko Kuroki, Hideo Aoki
We have systematically studied superconducting instabilities in the repulsive Hubbard model for d-wave and p-wave pairing in various 2D and 3D lattices. Using fluctuation exchange…
An electron correlation originated negative magnetoresistance in a system having a partly flat band
Ryotaro Arita, Kazuhiko Kuroki, Hideo Aoki
Inspired from an experimentally examined organic conductor, a novel mechanism for negative magnetoresistance is proposed for repulsively interacting electrons on a lattice whose ba…
Spin-fluctuation exchange study of superconductivity in two- and three-dimensional single-band Hubbard models
Ryotaro Arita, Kazuhiko Kuroki, Hideo Aoki
In order to identify the most favorable situation for superconductivity in the repulsive single-band Hubbard model, we have studied instabilities for d-wave pairing mediated by ant…
Molecular dynamics study of a classical two-dimensional electron system: Positional and orientational orders
Satoru Muto, Hideo Aoki
Molecular dynamics simulation is used to investigate the crystallization of a classical two-dimensional electron system, in which electrons interact with the Coulomb repulsion. Fro…