Marshall-Peierls sign rule for excited states of the frustrated J1−J2 Heisenberg antiferromagnet

Andreas Voigt, Johannes Richter and Nedko B. Ivanov

Physica A: Statistical Mechanics and its Applications, 1997, vol. 245, issue 3, 269-275

Abstract: We present analytical and numerical calculations for some excited states of the frustrated J1−J2spin-12 Heisenberg model for linear chains and square lattices. We consider the lowest eigenstates in the subspaces determined by the eigenvalue M of the spin operator Stotalz. Because of the reduced number of Ising basic states in the subspaces with higher M we are able to diagonalize systems with up to N = 144 spins. We find evidence that the Marshall-Peierls sign rule survives for a relatively large frustration parameter J2.

Keywords: Heisenberg antiferromagnet; Frustration (search for similar items in EconPapers)
Date: 1997
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:245:y:1997:i:3:p:269-275

DOI: 10.1016/S0378-4371(97)00330-0

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