38 citations · 201 across the 14 of their papers we have counts for
14 papers
Quantum Fluctuations of Chirality in One-Dimensional Spin-1/2 Multiferroics: Gapless Dielectric Response from Phasons and Chiral Solitons
Shunsuke Furukawa, Masahiro Sato, Yasuhiro Saiga +1
We present a quantum theory for one-dimensional spin-1/2 multiferroics, where the vector spin chirality couples with the electric polarization. Based on exact diagonalization and b…
Exact spin dynamics of the 1/r^2 supersymmetric t-J model in a magnetic field
Mitsuhiro Arikawa, Yasuhiro Saiga
The dynamical spin structure factor S^{zz}(Q,omega) in the small momentum region is derived analytically for the one-dimensional supersymmetric t-J model with 1/r^2 interaction. St…
Saturated Ferromagnetism from Statistical Transmutation in Two Dimensions
Yasuhiro Saiga, Masaki Oshikawa
The total spin of the ground state is calculated in the U -> infinity Hubbard model with uniform magnetic flux perpendicular to a square lattice, in the absence of Zeeman coupling.…
Coexistence of d_{x^2-y^2}-Wave Superconductivity and Antiferromagnetism Induced by a Staggered Field
Yasuhiro Saiga, Masaki Oshikawa
The two-dimensional t-J model in a staggered field is studied by exact diagonalization of small clusters. For the low-hole-density region and a realistic value of J/t, it is found…
Competition between spin exchange and correlated hopping
Y. Saiga, M. Imada
The ground-state phase diagram is numerically studied for an electronic model consisting of the spin exchange term (J) and the correlated hopping term (t_3: the three-site term). T…
Electron Addition Spectrum in the Supersymmetric t-J Model with Inverse-Square Interaction
Mitsuhiro Arikawa, Yasuhiro Saiga, Yoshio Kuramoto
The electron addition spectrum A^+(k,omega) is obtained analytically for the one-dimensional (1D) supersymmetric t-J model with 1/r^2 interaction. The result is obtained first for…