中国物理B ›› 1999, Vol. 8 ›› Issue (1): 52-56.doi: 10.1088/1004-423X/8/1/009

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PARABOLIC APPROXIMATION OF THE SPECIFIC HEAT IN QUANTUM XY SPIN GLASS MODEL WITH PLANAR DZYALOSHINSKII-MORIYA INTERACTIONS IN LONGITUDINAL FIELD

商育民1, 姚凯伦2   

  1. (1)Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China; (2)Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China; International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110015, China
  • 收稿日期:1998-03-19 修回日期:1998-05-25 出版日期:1999-01-15 发布日期:1999-01-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 19934010) and the Key Project of Basic Research.

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   

  1. 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
  • Received:1998-03-19 Revised:1998-05-25 Online:1999-01-15 Published:1999-01-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 19934010) and the Key Project of Basic Research.

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摘要： 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.

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.

中图分类号:  (Spin-glass and other random models)

  • 75.10.Nr
75.40.Cx (Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.)) 75.50.Lk (Spin glasses and other random magnets)