Quantum phase transitions of a generalized compass chain with staggered Dzyaloshinskii–Moriya interaction. (5th May 2017)

• Record Type: Journal Article
• Authors: Wu, Qing-Qiu; Ni, Wei-Hai; You, Wen-Long
• Is Part Of: Journal of physics. Volume 29:Number 22(2017)
• Publication Date: 2017-05-05
• Subjects: staggered Dzyaloshinskii–Moriya interaction -- generalized compass model -- quantum phase transition; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/aa6e6d
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: We consider a class of one-dimensional compass models with staggered Dzyaloshinskii–Moriya exchange interactions in an external transverse magnetic field. Based on the exact solution derived from Jordan–Wigner approach, we study the excitation gap, energy spectra, spin correlations and critical properties at phase transitions. We explore mutual effects of the staggered Dzyaloshinskii–Moriya interaction and the magnetic field on the energy spectra and the ground-state phase diagram. Thermodynamic quantities including the entropy and the specific heat are discussed, and their universal scalings at low temperature are demonstrated.