Spin Mode Switching at the Edge of a Quantum Hall System

Udit Khanna; Ganpathy Murthy; Sumathi Rao; Yuval Gefen

doi:10.1103/PhysRevLett.119.186804

Spin Mode Switching at the Edge of a Quantum Hall System

Udit Khanna
, Ganpathy Murthy
, Sumathi Rao
, Yuval Gefen

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

Quantum Hall states can be characterized by their chiral edge modes. Upon softening the edge potential, the edge has long been known to undergo spontaneous reconstruction driven by charging effects. In this Letter we demonstrate a qualitatively distinct phenomenon driven by exchange effects, in which the ordering of the edge modes at ν=3 switches abruptly as the edge potential is made softer, while the ordering in the bulk remains intact. We demonstrate that this phenomenon is robust, and has many verifiable experimental signatures in transport.

Original language	English
Article number	186804
Journal	Physical Review Letters
Volume	119
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevLett.119.186804
State	Published - Nov 2 2017

Bibliographical note

Publisher Copyright:
© 2017 American Physical Society.

Funding

G.\u2009M. thanks Sid Parameswaran for illuminating discussions, and he acknowledges the Aspen Center for Physics (NSF Grant No. 1066293) for its hospitality, the U.S.-Israel BSF (Grants No. 2012120 and No. 2016130), and NSF-DMR 1306897 for support. Y.\u2009G. thanks Dmitry G. Polyakov for useful discussions, and he acknowledges ISF (Grant No. 1349/14), the DFG (Grants No. RO 2247/8-1, No. CRC 183), the IMOS Israel-Russia program, and the Joint Italy-Israel Lab (MIUR-QUANTRA) for support. The research of U.\u2009K. was supported in part by the INFOSYS scholarship for senior students.

Funders	Funder number
Aspen Center for Physics
MIUR-QUANTRA
IMOS Israel-Russia program
Deutsche Forschungsgemeinschaft	RO 2247/8-1, CRC 183
U.S. Department of Energy Chinese Academy of Sciences Guangzhou Municipal Science and Technology Project Oak Ridge National Laboratory Extreme Science and Engineering Discovery Environment National Science Foundation National Energy Research Scientific Computing Center National Natural Science Foundation of China	1066293
NSF-DMR	1306897
US-Israel Binational Science Foundation	1349/14
United States-Israel Binational Science Foundation	2016130, 2012120

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.119.186804

Cite this

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Spin Mode Switching at the Edge of a Quantum Hall System

Abstract

Bibliographical note

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