Restoration of topological properties at finite temperatures in a heavy-fermion system

Abstract

We study how topological phases evolve in the Kane-Mele-Kondo lattice at finite temperatures and obtain the topological Doniach phase diagram. In particular, we find an intriguing crossover behavior induced by the interplay between the topological structure and electron correlations; the topological properties are restored by temperature effects. This restoration can be observed in the behavior of the bulk as well as the edge. In the bulk, we observe an increase of the spin-Hall conductivity at finite temperatures, while it is zero in the low temperature region. At the edge, we observe gapless edge modes emerging with increasing temperature.

7 pages and 8 figures

References in corpus (15)

• Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
• Evidence of Majorana fermions in an Al - InAs nanowire topological superconductor
• The numerical renormalization group method for quantum impurity systems
• Topological Mott Insulators
• Sum-rule Conserving Spectral Functions from the Numerical Renormalization Group
• A Numerical Renormalization Group approach to Green's Functions for Quantum Impurity Models
• Simplified topological invariants for interacting insulators
• Mott Physics and Topological Phase Transition in Correlated Dirac Fermions
• Characterization of a topological Mott insulator in one dimension
• Phonon-induced topological transitions and crossovers in Dirac materials
• Topological antiferromagnetic phase in a correlated Bernevig-Hughes-Zhang model
• Correlation effects in pyrochlore iridate thin films grown along the $[111]$ direction
• Cellular dynamical mean-field theory study of an interacting topological honeycomb lattice model at finite temperature
• Topological phase in a two-dimensional metallic heavy-fermion system
• Optical conductivity of topological Kondo insulating states

Cited by in corpus (7)

• Temperature-induced topological phase transitions: promoted vs. suppressed non-trivial topology
• Coexistence of light and heavy surface states in a topological multi-band Kondo insulator
• Uhlmann number in translational invariant systems
• Antiferromagnetic Chern insulator in centrosymmetric systems
• Haldane Model at finite temperature
• Hexagon Ising-Kondo lattice: An implication for intrinsic antiferromagnetic topological insulator
• Antiferromagnetic topological insulators in heavy-fermion systems