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- W4300820583 abstract "A quantum anomalous Hall state with high Chern number has so far been realized in multiplayer structures consisting of alternating magnetic and undoped topological insulator layers. However, in previous proposals, the Chern number can be only tuned by varying the doping concentration or the width of the magnetic topological insulator layers. This drawback largely restrict the applications of dissipationless chiral edge currents in electronics since the number of conducting channels remains fixed. In this work, we propose a way of varying the Chern number at will in these multilayered structures by means of an external electric field applied along the stacking direction. In the presence of an electric field in the stacking direction, the inverted bands of the unbiased structure coalesce and hybridize, generating new inverted bands and collapsing the previously inverted ones. In this way, the number of Chern states can be tuned externally in the sample, without the need of modifying the number and width of the layers or the doping level. We showed that this effect can be uncovered by the variation of the transverse conductance as a function of the electric field at constant injection energy at the Fermi level." @default.
- W4300820583 created "2022-10-04" @default.
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- W4300820583 date "2022-08-06" @default.
- W4300820583 modified "2023-10-18" @default.
- W4300820583 title "Effect of the external fields in high Chern number quantum anomalous Hall insulators" @default.
- W4300820583 doi "https://doi.org/10.48550/arxiv.2208.03585" @default.
- W4300820583 hasPublicationYear "2022" @default.
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