Temperature-induced spontaneous time-reversal symmetry breaking on the honeycomb lattice

• Author(s): Liu, Wei ; Punnoose, Alexander [UNESP]
• Date: 2022
• Persistent ID: http://hdl.handle.net/11449/227979
• Origin: Oasisbr
• Document Type: Journal article
• Language: English

Description

Made available in DSpace on 2022-04-29T07:26:02Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-04-30

Phase transitions involving spontaneous time-reversal symmetry breaking are studied on the honeycomb lattice at finite hole doping with next-nearest-neighbor repulsion. We derive an exact expression for the mean-field equation of state in closed form, valid at temperatures much less than the Fermi energy. Contrary to standard expectations, we find that thermally induced intraband particle-hole excitations can create and stabilize a uniform metallic phase with broken time-reversal symmetry as the temperature is raised in a region where the ground state is a trivial metal.

Physics Department City College City University of New York

Instituto de Física Teórica Universidade Estadual Paulista, R. Dr. Bento Teobaldo Ferraz 271

Instituto de Física Teórica Universidade Estadual Paulista, R. Dr. Bento Teobaldo Ferraz 271