PARABOLIC APPROXIMATION OF THE SPECIFIC HEAT IN QUANTUM XY SPIN GLASS MODEL WITH PLANAR DZYALOSHINSKII-MORIYA INTERACTIONS IN LONGITUDINAL FIELD
Shang Yu-min (商育民)a, Yao Kai-lun (姚凯伦)ab
a Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China; b International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110015, China
Abstract The quantum infinite range XY spin glass model with the infinite range planar Dzyaloshinskii-Moriya interaction in external field for spin S=1/2 is investigated theoretically. Numerical calculations show that, the specific heat depending on the temperature has crossover behavior; the weak field dependence of the specific heat can be fitted by the parabolic approximation, C/T=A+Bh2, the coefficient B is peaked near the transition point.
Received: 19 March 1998
Revised: 25 May 1998
Accepted manuscript online:
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 19934010) and the Key Project of Basic Research.
Cite this article:
Shang Yu-min (商育民), Yao Kai-lun (姚凯伦) PARABOLIC APPROXIMATION OF THE SPECIFIC HEAT IN QUANTUM XY SPIN GLASS MODEL WITH PLANAR DZYALOSHINSKII-MORIYA INTERACTIONS IN LONGITUDINAL FIELD 1999 Acta Physica Sinica (Overseas Edition) 8 52
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