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cond-mat.str-el2005★ 81 cited
Tomonaga-Luttinger parameters for doped Mott insulators
Satoshi Ejima, Florian Gebhard, Satoshi Nishimoto
The Tomonaga--Luttinger parameter determines the critical behavior in quasi one-dimensional correlated electron systems, e.g., the exponent for the density of states near…
cond-mat.str-el2004★ 17 cited
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…
cond-mat.str-el2003
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…