A Majorana fermion t-J model in one dimension

Sen, D and Shastry, BS (1997) A Majorana fermion t-J model in one dimension. In: Journal Of Physics-Condensed Matter, 9 (38). pp. 7963-7979.

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Abstract

We study a rotation-invariant Majorana fermion model in one dimension using diagrammatic perturbation theory and numerical diagonalization of small systems. The model is inspired by a Majorana representation of the antiferromagnetic spin-1/2 chain, and it is similar in form to the t-J model of electrons, except that the Majorana fermions carry spin 1 and Z(2) charge. We discuss the implications of our results for the low-energy excitations of the spin-1/2 chain. We also discuss a generalization of our model from three species of Majorana fermions to N species; the SO(4) symmetric model is particularly interesting.

Item Type:	Journal Article
Additional Information:	Copyright of this article belongs to IOP Publishing.
Department/Centre:	Division of Physical & Mathematical Sciences > Centre for Theoretical Studies Division of Physical & Mathematical Sciences > Physics
Date Deposited:	11 Feb 2010 07:13
Last Modified:	19 Sep 2010 05:01
URI:	http://eprints.iisc.ernet.in/id/eprint/18277

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