Topology of critical chiral phases: Multiband insulators and superconductors
Oleksandr Balabanov, Daniel Erkensten, Henrik Johannesson
Abstract
Recent works have proved the existence of symmetry-protected edge states in certain one-dimensional topological band insulators and superconductors at the gap-closing points which define quantum phase transitions between two topologically nontrivial phases. We show how this picture generalizes to multiband critical models belonging to any of the chiral symmetry classes AIII, BDI, or CII of noninteracting fermions in one dimension.
Topics & Concepts
Topological insulatorPhysicsFermionSuperconductivityTopology (electrical circuits)Symmetry (geometry)Theoretical physicsQuantumQuantum mechanicsChiral symmetryPhase (matter)Phase transitionCondensed matter physicsQuantum phase transitionEnhanced Data Rates for GSM EvolutionSymmetry breakingMirror symmetryTopological Materials and PhenomenaQuantum many-body systemsPhysics of Superconductivity and Magnetism