Quantum site-random XY spin glasses in a random field

A quantum spherical version of the site-random XY model in the presence of random field is presented in the boson space. In the phase diagram drawn as a function of the strength of random field, we find that the ferromagnetic and spin-glass phases are reduced by quantum fluctuations and destroyed completely by random-field fluctuations with sufficiently large values of the random-field variance.

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Year of publication:	1997
Authors:	Ma, Yu-qiang
Published in:	Physica A: Statistical Mechanics and its Applications. - Elsevier, ISSN 0378-4371. - Vol. 245.1997, 3, p. 231-237
Publisher:	Elsevier
Subject:	Phase transitions \| Disordered system

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Type of publication:	Article
Source:	RePEc - Research Papers in Economics

Persistent link: https://www.econbiz.de/10010871912