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High-temperature quantum anomalous Hall regime in a MnBi2Te4/Bi2Te3 superlattice

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dc.abstract.enThe quantum anomalous Hall effect1,2 is a fundamental transport response of a topological insulator in zero magnetic field. Its physical origin is a result of an trinsically inverted electronic band structure and ferromagnetism3, and its most important manifestation is the dissipationless flow of chiral charge currents at the edges of the system4, a property that has the potential to transform future quantum electronics5,6. Here, we report a Berry-curvature-driven4,7 anomalous Hall regime at temperatures of several Kelvin in the magnetic topological bulk crystals in which Mn ions self-organize into a period-ordered MnBi2Te4/Bi2Te3 superlattice. Robust ferromagnetism of the MnBi2Te4 monolayers opens a surface gap8–10, and when the Fermi level is tuned to be within this gap, the anomalous Hall conductance reaches an e2/h quantization plateau, which is a clear indication of chiral transport through the edge states. The quantization in this regime is not obstructed by the bulk conduction channels and therefore should be present in a broad family of topological magnets.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorSobczak, Kamil
dc.contributor.authorCano, Jennifer
dc.contributor.authorKrusin-Elbaum, Lia
dc.contributor.authorPark, Kyungwha
dc.contributor.authorGeorgescu, Alexandru B.
dc.contributor.authorPluciński, Łukasz
dc.contributor.authorHeider, Tristan
dc.contributor.authorSitnicka, Joanna
dc.contributor.authorFedorchenko, Irina V.
dc.contributor.authorKonczykowski, Marcin
dc.contributor.authorChen, Zhiyi
dc.contributor.authorDeng, Haiming
dc.contributor.authorWołoś, Agnieszka
dc.contributor.authorBorysiuk, Jolanta
dc.date.accessioned2024-01-25T03:12:03Z
dc.date.available2024-01-25T03:12:03Z
dc.date.issued2021
dc.description.financePublikacja bezkosztowa
dc.description.number1
dc.description.volume17
dc.identifier.doi10.1038/S41567-020-0998-2
dc.identifier.issn1745-2473
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/108496
dc.identifier.weblinkhttp://www.nature.com/articles/s41567-020-0998-2.pdf
dc.languageeng
dc.pbn.affiliationphysical sciences
dc.relation.ispartofNature Physics
dc.relation.pages36-42
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.titleHigh-temperature quantum anomalous Hall regime in a MnBi2Te4/Bi2Te3 superlattice
dc.typeJournalArticle
dspace.entity.typePublication