Fractional edge reconstruction in integer quantum Hall phases

Udit Khanna, Moshe Goldstein, Yuval Gefen

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Protected edge modes are the cornerstone of topological states of matter. The simplest example is provided by the integer quantum Hall state at Landau level filling unity, which should feature a single chiral mode carrying electronic excitations. In the presence of a smooth confining potential it was hitherto believed that this picture may only be partially modified by the appearance of additional counterpropagating integer-charge modes. Here, we demonstrate the breakdown of this paradigm: The system favors the formation of edge modes supporting fractional excitations. This accounts for previous observations, and leads to additional predictions amenable to experimental tests.

Original languageEnglish
Article numberL121302
JournalPhysical Review B
Volume103
Issue number12
DOIs
StatePublished - 29 Mar 2021
Externally publishedYes

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©2021 American Physical Society.

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