PHASE-DIAGRAMS OF THE QUANTUM XY SPIN-GLASS MODEL IN A TRANSVERSE FIELD

被引：12

作者：

BUTTNER, G

KOPEC, TK

USADEL, KD

机构：

[1] Theoretische Tieftemperaturphysik and Sonderforschungsbereich 166, Universität Duisburg, Lotharstrasse 1

来源：

PHYSICS LETTERS A | 1990年 / 149卷 / 5-6期

关键词：

D O I：

10.1016/0375-9601(90)90423-L

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The infinite range XY spin glass model in a transverse field Γ is investigated by means of the static approximation within the Trotter-Suzuki approach and thermo-field dynamics. The corresponding phase diagrams are obtained showing that a spin glass transition takes place for non-zero values of the transverse field up to a critical value. However, it is found that the results from both methods disagree considerably from recent calculations by De Cesare et al. on this model, performed by using the two-spin cluster approximation. © 1990.

引用

页码：248 / 252

页数：5

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