21 citations · 38 across the 4 of their papers we have counts for
6 papers
Ring Exchange Mechanism for Triplet Superconductivity in a Two-Chain Hubbard Model: Possible Relevance to Bechgaard Salts
Y. Ohta, S. Nishimoto, T. Shirakawa +1
The density-matrix renormalization group method is used to study the ground state of the two-chain zigzag-bond Hubbard model at quarter filling. We show that, with a proper choice…
Phase Diagram of the ------ Model at Quarter Filling
Satoshi Ejima, Florian Gebhard, Satoshi Nishimoto +1
We examine the ground-state properties of the one-dimensional Hubbard model at quarter filling with Coulomb interactions between nearest-neighbors and next-nearest neighbors…
Separated Spin and Charge Excitations and their Coupling in the Spin-Pseudospin Model for Quarter-Filled Ladders
Y. Ohta, T. Nakaegawa, S. Ejima
Quantum Monte Carlo (QMC) and density-matrix renormalization group (DMRG) methods are used to study the coupled spin-pseudospin Hamiltonian in one-dimension (1D) that models the ch…
ARPES spectra of the stripe phase in the 2D t-J model
R. Eder, Y. Ohta
The 2D t-J model with and without t' and t'' hopping-terms is studied by exact diagonalization on a 5 x 4 cluster, which realizes a hole stripe in y-direction in a dimerized single…
Exact Diagonalization Study of Strongly Correlated Electron Models: Hole pockets and shadow bands in the doped t-J model
Y. Ohta, R. Eder
A detailed exact-diagonalization study is made for the doping dependence of the single-particle spectral function and momentum distribution function of…
Spin dynamics of the doped t-J model
R. Eder, Y. Ohta
We present a new method for studying the low energy excitations in finite cluster systems and apply it to clarify the nature of the low energy spin excitations in the moderately do…