129 citations · 509 across the 33 of their papers we have counts for
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Incommensurate spiral magnetic order on anisotropic triangular lattice: Dynamical mean field study in a spin-rotating frame
Shimpei Goto, Susumu Kurihara, Daisuke Yamamoto
We study the ground-state magnetism of the half-filled Hubbard model on the anisotropic triangular lattice, where two out of three bonds have hopping and the third one has $t^\…
A Phenomenological Theory of Loop-Current Phases
Shimpei Goto, Susumu Kurihara
A phenomenological theory of the loop-current and loop-spin-current phases is proposed. In order to investigate the stability of these phases, a Ginzburg-Landau-Wilson type action…
Spontaneous loop-spin current with topological characters in the Hubbard model
Shimpei Goto, Keisuke Masuda, Susumu Kurihara
We find a state characterized by a spontaneous loop-spin current and a single-particle gap in the Hubbard model within the variational cluster approach. This state exists for arbit…
Tunable rotons in square lattice antiferromagnets under strong magnetic fields
Yurika Kubo, Susumu Kurihara
Excitation spectra of square lattice Heisenberg antiferromagnets in magnetic fields are investigated by the spin-wave theory. It is pointed out that a rotonlike structure appears i…
Spin Conductivity in Two-Dimensional Non-Collinear Antiferromagnets
Yurika Kubo, Susumu Kurihara
We propose a method to derive the spin current operator for non-collinear Heisenberg antiferromagnets. We show that the spin conductivity calculated by the spectral representation…
Green's function theory for spin-1/2 ferromagnets with an easy-plane exchange anisotropy
Daisuke Yamamoto, Synge Todo, Susumu Kurihara
The many-body Green's function theory with the random-phase approximation is applied to the study of easy-plane spin-1/2 ferromagnets in an in-plane magnetic field. We demonstrate…