Eur. Phys. J. B 8, 335-338 (1999)
https://doi.org/10.1007/s100510050698

Quantum XY spin glass model with planar Dzyaloshinskii-Moriya interactions in longitudinal field^*

¹ Department of Physics, Huazhong University of Science and Technology, Wuhan, 430074, China
² Department of Physics, The Hong Kong University of Science and Technology, Kowloon, Hong Kong
³ CCAST (World Lab.) P.O. Box 8730, Beijing 100080, and International Center for Material Physics, Academia Sinica, Shenyang 110015, China

Received: 11 March 1998
Published online: 15 April 1999

Abstract

In the replica symmetric approximation and static limit in Matsubara "imaginary time", the quantum XY spin glass model with planar Dzyaloshinskii-Moriya interaction in longitudinal field is investigated. Several thermodynamic quantities are calculated numerically as well as spin self-interaction and spin glass order parameter for spin S=1/2. It is shown that the entropy is not independent of the field. A crossover behavior of the specific heat depending on temperature is found. There is a deviation from the parabolic approximation, .