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.
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