Effective Hamiltonian for a half-filled asymmetric ionic Hubbard chain with alternating on-site interaction-Reference-Cited by-同舟云学术

Effective Hamiltonian for a half-filled asymmetric ionic Hubbard chain with alternating on-site interaction

Published:2016-01-25 Issue:03 Volume:30 Page:1550260
ISSN:0217-9792
Container-title:International Journal of Modern Physics B
language:en
Short-container-title:Int. J. Mod. Phys. B

Author:

Grusha I.¹,Menteshashvili M.²,Japaridze G. I.³

Affiliation:

1. Faculty of Natural Sciences and Engineering, Ilia State University, Cholokashvili Avenue 3-5, Tbilisi 0162, Georgia

2. Department of Physics, University of Fribourg, Chemin du Musée 3, Fribourg, CH-1700, Switzerland

3. Andronikashvili Institute of Physics, Tamarashvili Street 6, Tbilisi 0177, Georgia

Abstract

We derive an effective spin Hamiltonian for the one-dimensional half-filled asymmetric ionic Hubbard model (IHM) with alternating on-site interaction in the limit of strong repulsion. It is shown that the effective Hamiltonian is that of a spin S = 1/2 anisotropic XXZ Heisenberg chain with alternating next-nearest-neighbor (NNN) and three-spin couplings in the presence of a uniform and a staggered magnetic field.

Publisher

World Scientific Pub Co Pte Lt

Subject

Condensed Matter Physics,Statistical and Nonlinear Physics

Link

https://www.worldscientific.com/doi/pdf/10.1142/S0217979215502604

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