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Edge channels of broken-symmetry quantum Hall states in graphene visualized by atomic force microscopy

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Kim, Sungmin ; Schwenk, Johannes ; Walkup, Daniel ; Zeng, Yihang ; Ghahari, Fereshte ; Le, Son T. ; Slot, Marlou R. ; Berwanger, Julian ; Blankenship, Steven R. ; Watanabe, Kenji ; Taniguchi, Takashi ; Giessibl, Franz J. ; Zhitenev, Nikolai B. ; Dean, Cory R. ; Stroscio, Joseph A.
License: Creative Commons Attribution 4.0
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Date of publication of this fulltext: 05 Nov 2021 08:53


The quantum Hall (QH) effect, a topologically non-trivial quantum phase, expanded the concept of topological order in physics bringing into focus the intimate relation between the "bulk" topology and the edge states. The QH effect in graphene is distinguished by its four-fold degenerate zero energy Landau level (zLL), where the symmetry is broken by electron interactions on top of lattice-scale ...


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