Observation of ballistic upstream modes at fractional quantum Hall edges of graphene

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

doi:10.1038/s41467-021-27805-4

Nature Communications (Jan 2022)

Observation of ballistic upstream modes at fractional quantum Hall edges of graphene

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

Affiliations

Ravi Kumar: Department of Physics, Indian Institute of Science
Saurabh Kumar Srivastav: 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
Yuval Gefen: Department of Condensed Matter Physics, Weizmann Institute of Science
Alexander D. Mirlin: 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/s41467-021-27805-4
Journal volume & issue: Vol. 13, no. 1
pp. 1 – 7

Abstract

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Recently graphene has emerged as a new platform for the study of quantum Hall states. Here, by means of noise measurements, the authors report evidence for the existence of the upstream mode and its ballistic nature in the hole-conjugate fractional quantum Hall state in a bilayer graphene device.

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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