Thermal Hall conductance and a relative topological invariant of gapped two-dimensional systems
- California Institute of Technology (CalTech), Pasadena, CA (United States); Caltech
- California Institute of Technology (CalTech), Pasadena, CA (United States)
We derive a Kubo-like formula for the thermal Hall conductance of a 2d lattice systems which is free from ambiguities associated with the definition of energy magnetization. We use it to define a relative topological invariant of gapped 2d lattice systems at zero temperature. Up to a numerical factor, it can be identified with the difference of chiral central charges for the corresponding edge modes. This establishes the bulk-boundary correspondence for the chiral central charge. Here, we also show that for any local commuting projector Hamiltonian, the relative chiral central charge vanishes, while for free fermionic systems, it is related to the zero-temperature electric Hall conductance via the Wiedemann-Franz law.
- Research Organization:
- California Institute of Technology (CalTech), Pasadena, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Grant/Contract Number:
- SC0011632
- OSTI ID:
- 1762782
- Journal Information:
- Physical Review. B, Journal Name: Physical Review. B Journal Issue: 4 Vol. 101; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Resonant thermal Hall effect of phonons coupled to dynamical defects
|
journal | November 2022 |
Similar Records
Hall conductance and the statistics of flux insertions in gapped interacting lattice systems
Generalized Hall conductivities in local commuting projector models: Generalized symmetries and protected surface modes