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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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|
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