Spin-charge separation in the one dimensional Hubbard model with longer range hopping

Castleton, C.W.M. ORCID: 0000-0001-6790-6569 and Long, M.W., 1994. Spin-charge separation in the one dimensional Hubbard model with longer range hopping. Physica C: Superconductivity, 235240 (4), pp. 2209-2210. ISSN 0921-4534

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Abstract

Although it is very hard to solve the 2D Hubbard model in the U → ∞ limit, process can be made using a class of 1D models in which additional longer range-hopping is included. Here, an unusual form of mean field theory is used to study the charge motion in the simplest model of the class - that with nearest and next next nearest neighbour hopping. The solutions found are all spin-charge separated, and for lower electron densities, indications of hard core boson like behaviour for the charge degrees of freedom are seen. For higher electron densities Nagaoka ferromagnetism is seen.

Item Type: Journal article
Publication Title: Physica C: Superconductivity
Creators: Castleton, C.W.M. and Long, M.W.
Date: December 1994
Volume: 235240
Number: 4
ISSN: 0921-4534
Identifiers:
NumberType
10.1016/0921-4534(94)92326-4DOI
Divisions: Schools > School of Science and Technology
Depositing User: EPrints Services
Date Added: 09 Oct 2015 10:57
Last Modified: 09 Jun 2017 13:45
URI: http://irep.ntu.ac.uk/id/eprint/20653

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