2017/05/05 by Qing-Qiu Wu, Wei-Hai Ni, Weihai Ni +2
Physics and Astronomy · #Compass #Condensed matter physics #Entropy (arrow of time) #Exchange interaction #Excitation #Ferromagnetism #Ground state #Ising model #Magnetic field #Phase (matter) #Phase diagram #Phase transition #Physics #Quantum #Quantum many-body systems #Quantum mechanics #Quantum phase transition #Random lasers and scattering media #Spectral line #Theoretical and Computational Physics #cond-mat.str-el
paper · pdf · doi:10.1088/1361-648x/aa6e6d
published as J. Phys.: Condens. Matter 29, 225804 (2017) · 8 page, 10 figures
openalex publication_date 2017/05/05 · arxiv created 2017/05/31 · arxiv updated 2017/06/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.