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- W4313304903 abstract "Chern insulators are two-dimensional magnetic topological materials that conduct electricity along their edges via the one-dimensional chiral modes. The number of these modes is a topological invariant called the first Chern number $C$, that defines the quantized Hall conductance as $S_{xy}= C e^2/h$. Increasing $C$ is pivotal for the realization of low-power-consumption topological electronics, but there has been no clear-cut solution of this problem so far, with the majority of existing Chern insulators showing $C=1$. Here, by using state-of-the-art theoretical methods, we propose an efficient approach for the realization of the high-$C$ Chern insulator state in MnBi$_2$Te$_4$/hBN van der Waals multilayer heterostructures. We show that a stack of $n$ MnBi$_2$Te$_4$ films with $C=1$ intercalated by hBN monolayers gives rise to a high Chern number state with $C=n$, characterized by $n$ chiral edge modes. This state can be achieved both under the external magnetic field and without it, both cases leading to the quantized Hall conductance $S_{xy}= C e^2/h$. Our results therefore pave way to practical high-$C$ quantized Hall systems." @default.
- W4313304903 created "2023-01-06" @default.
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- W4313304903 date "2022-12-27" @default.
- W4313304903 modified "2023-09-23" @default.
- W4313304903 title "High Chern number van der Waals magnetic topological multilayers MnBi$_2$Te$_4$/hBN" @default.
- W4313304903 doi "https://doi.org/10.48550/arxiv.2212.13457" @default.
- W4313304903 hasPublicationYear "2022" @default.
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