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Title: Thermal Hall conductance and a relative topological invariant of gapped two-dimensional systems

Abstract

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.

Authors:
 [1]; ORCiD logo [1]
  1. California Institute of Technology (CalTech), Pasadena, CA (United States)
Publication Date:
Research Org.:
California Institute of Technology (CalTech), Pasadena, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
OSTI Identifier:
1762782
Grant/Contract Number:  
SC0011632
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. B
Additional Journal Information:
Journal Volume: 101; Journal Issue: 4; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Edge states; Quantum phase transitions; Thermal Hall effect; Topological phases of matter; Transport phenomena

Citation Formats

Kapustin, Anton, and Spodyneiko, Lev. Thermal Hall conductance and a relative topological invariant of gapped two-dimensional systems. United States: N. p., 2020. Web. doi:10.1103/physrevb.101.045137.
Kapustin, Anton, & Spodyneiko, Lev. Thermal Hall conductance and a relative topological invariant of gapped two-dimensional systems. United States. https://doi.org/10.1103/physrevb.101.045137
Kapustin, Anton, and Spodyneiko, Lev. Fri . "Thermal Hall conductance and a relative topological invariant of gapped two-dimensional systems". United States. https://doi.org/10.1103/physrevb.101.045137. https://www.osti.gov/servlets/purl/1762782.
@article{osti_1762782,
title = {Thermal Hall conductance and a relative topological invariant of gapped two-dimensional systems},
author = {Kapustin, Anton and Spodyneiko, Lev},
abstractNote = {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.},
doi = {10.1103/physrevb.101.045137},
journal = {Physical Review. B},
number = 4,
volume = 101,
place = {United States},
year = {Fri Jan 31 00:00:00 EST 2020},
month = {Fri Jan 31 00:00:00 EST 2020}
}

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Works referencing / citing this record:

Resonant thermal Hall effect of phonons coupled to dynamical defects
journal, November 2022

  • Guo, Haoyu; Joshi, Darshan G.; Sachdev, Subir
  • Proceedings of the National Academy of Sciences, Vol. 119, Issue 46
  • DOI: 10.1073/pnas.2215141119