Determination of topological edge quantum numbers of fractional quantum Hall phases by thermal conductance measurements

Saurabh Kumar Srivastav; Ravi Kumar; Christian Spånslätt; K. Watanabe; T. Taniguchi; Alexander D. Mirlin; Yuval Gefen; Anindya Das

doi:10.1038/s41467-022-32956-z

Nature Communications (Sep 2022)

Determination of topological edge quantum numbers of fractional quantum Hall phases by thermal conductance measurements

Saurabh Kumar Srivastav,
Ravi Kumar,
Christian Spånslätt,
K. Watanabe,
T. Taniguchi,
Alexander D. Mirlin,
Yuval Gefen,
Anindya Das

Affiliations

Saurabh Kumar Srivastav: Department of Physics, Indian Institute of Science
Ravi Kumar: Department of Physics, Indian Institute of Science
Christian Spånslätt: Department of Microtechnology and Nanoscience (MC2), Chalmers University of Technology
K. Watanabe: National Institute of Material Science
T. Taniguchi: National Institute of Material Science
Alexander D. Mirlin: Institute for Quantum Materials and Technologies, Karlsruhe Institute of Technology
Yuval Gefen: Institute for Quantum Materials and Technologies, Karlsruhe Institute of Technology
Anindya Das: Department of Physics, Indian Institute of Science

DOI: https://doi.org/10.1038/s41467-022-32956-z
Journal volume & issue: Vol. 13, no. 1
pp. 1 – 8

Abstract

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The knowledge of quantum numbers of the edge modes is essential for understanding fractional Hall states containing counter-propagating downstream and upstream modes. Here the authors identify the edge quantum numbers by probing a crossover from non-equilibrated to equilibrated edge mode regime in thermal conductance.

Published in Nature Communications

ISSN: 2041-1723 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Science
Website: https://www.nature.com/ncomms/

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