Collinear néel-type ordering in partially frustrated lattices

Bhaumik, Uma ; Bose, Indrani (1998) Collinear néel-type ordering in partially frustrated lattices Physical Review B, 58 (1). pp. 73-76. ISSN 0163-1829

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Official URL: http://prb.aps.org/abstract/PRB/v58/i1/p73_1

Related URL: http://dx.doi.org/10.1103/PhysRevB.58.73

Abstract

We consider two partially frustrated S=1/2 antiferromagnetic spin systems on the triangular and pentagonal lattices. In an elementary plaquette of the two lattices, one bond has exchange interaction strength a (a≤1) whereas all other bonds have exchange interaction strength unity. We show that for a less than a critical value ac, collinear Néel-type ordering is possible in the ground state. The ground-state energy and the excitation spectrum have been determined using linear spin-wave theory based on the Holstein-Primakoff transformation.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:5960
Deposited On:19 Oct 2010 10:03
Last Modified:16 May 2016 16:23

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