A variational Treatment of the +/− J-model

G. Sobotta

Physica A: Statistical Mechanics and its Applications, 1986, vol. 136, issue 2, 537-550

Abstract: The exponentially degenerated ground state of the +/− J-model is caused by frustrated spins. We present a variational technique, in which the frustrated spins are treated exactly, while the non-frustrated spins are treated as in models with vanishing residual entropy.

Date: 1986
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:136:y:1986:i:2:p:537-550

DOI: 10.1016/0378-4371(86)90266-9

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