Quantum Phase Transition from Dirac Semimetal to Quantum Spin-Hall Insulator
ORAL
Abstract
Employing determinantal quantum Monte Carlo simulations, we design and investigate a lattice model of fermions coupled with Ising fields. By turning the strength of a transverse field, the Ising spins experience a quantum phase transition from a paramagnetic phase to a ferromagnetic phase, which furthermore triggers a topological phase transition between a Dirac semimetal state and a quantum spin-Hall insulating state for the fermionic degrees of freedom. The nature of such an interaction-driven topological phase transition and the associated quantum critical region are fully revealed by the unbiased numerical approach.
–
Authors
Yuan-Yao He
Department of Physics, Renmin University of China
Xiao Yan Xu
Institute of Physics, Chinese Academy of Sciences
Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences
Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
Institute of Physics,Chinese Academy of Sciences
Kai Sun
University of Michigan
Univ of Michigan - Ann Arbor
University of Michigan, Ann Arbor
Department of Physics, University of Michigan, Ann Arbor
Department of Physics, University of Michigan
F. F. Assaad
Universität Würzburg
Institut fuer Theoretische Physik und Astrophysik,Universitat Wuerzburg, 97074 Wuerzburg, Germany
Institut für Theoretische Physik und Astrophysik, Universität Würzburg
Zi Yang Meng
Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Institute of Physics, Chinese Academy of Sciences
Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences
Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
Institute of Physics, Chinese Academy of Sciences, Beijing
