The DOI matches its Crossref record; 38 of the 38 references it cites were found in a registry or an index.
Realization of the Axion Insulator State in Quantum Anomalous Hall Sandwich Heterostructures
Open accessAbstract
The "magnetoelectric effect" arises from the coupling between magnetic and electric properties in materials. The Z_{2} invariant of topological insulators (TIs) leads to a quantized version of this phenomenon, known as the topological magnetoelectric (TME) effect. This effect can be realized in a new topological phase called an "axion insulator" whose surface states are all gapped but the interior still obeys time reversal symmetry. We demonstrate such a phase using electrical transport measurements in a quantum anomalous Hall (QAH) sandwich heterostructure, in which two compositionally different magnetic TI layers are separated by an undoped TI layer. Magnetic force microscopy images of the same sample reveal sequential magnetization reversals of the top and bottom layers at different coercive fields, a consequence of the weak interlayer exchange coupling due to the spacer. When the magnetization is antiparallel, both the Hall resistance and Hall conductance show zero plateaus, accompanied by a large longitudinal resistance and vanishing longitudinal conductance, indicating the realization of an axion insulator state. Our findings thus show evidence for a phase of matter distinct from the established QAH state and provide a promising platform for the realization of the TME effect.
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Cites
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Magnetoelectric Polarizability and Axion Electrodynamics in Crystalline Insulators
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Cited by
Prediction and observation of an antiferromagnetic topological insulator
Otrokov, M. M., Klimovskikh, I. I., Bentmann, H., Estyunin, D., Zeugner, A., Aliev, Z. S., Gaß, S., Wolter, A. U. B., Koroleva, A. V., Shikin, A. M., et al. (2019) · Nature · doi:10.1038/s41586-019-1840-9 · Cited by 1,156
Magnetic topological insulators
Tokura, Y., Yasuda, K., & Tsukazaki, A. (2019) · Nature Reviews Physics · doi:10.1038/s42254-018-0011-5 · Cited by 1,074
Colloquium : Quantum anomalous Hall effect
Chang, C.-Z., Liu, C.-X., & MacDonald, A. H. (2023) · Reviews of Modern Physics · doi:10.1103/revmodphys.95.011002 · Cited by 508
Self-citationHigher-Order Topology of the Axion Insulator EuIn2As2
Xu, Y., Song, Z., Wang, Z., Weng, H., & Dai, X. (2019) · Physical Review Letters · doi:10.1103/physrevlett.122.256402 · Cited by 353
Chen, Y. J., Xu, L. X., Li, J. H., Li, Y. W., Wang, H. Y., Zhang, C. F., Li, H., Wu, Y., Liang, A. J., Chen, C., et al. (2019) · Physical Review X · doi:10.1103/physrevx.9.041040 · Cited by 322
Metadata
- Authors
- Xiao, D., Jiang, J., Shin, J.-H., Wang, W., Wang, F., Zhao, Y.-F., Liu, C., Wu, W., Chan, M. H. W., Samarth, N., & Chang, C.-Z.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2018-01-31
- Volume
- 120
- Issue
- 5
- Pages
- 056801-056801
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2764014391
- Cited by
- 355
- References
- 38
- FWCI
- 19.16
- Type
- journal article
- Language
- en
- Open access
- green
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- Xiao, D., Jiang, J., Shin, J.-H., Wang, W., Wang, F., Zhao, Y.-F., Liu, C., Wu, W., Chan, M. H. W., Samarth, N., & Chang, C.-Z. (2018). Realization of the Axion Insulator State in Quantum Anomalous Hall Sandwich Heterostructures. Physical Review Letters. https://doi.org/10.1103/physrevlett.120.056801
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