The DOI matches its Crossref record; 30 of the 30 references it cites were found in a registry or an index.
High-Chern-number and high-temperature quantum Hall effect without Landau levels
Open accessAbstract
The quantum Hall effect (QHE) with quantized Hall resistance of h/νe2 started the research on topological quantum states and laid the foundation of topology in physics. Since then, Haldane proposed the QHE without Landau levels, showing nonzero Chern number |C| = 1, which has been experimentally observed at relatively low temperatures. For emerging physics and low-power-consumption electronics, the key issues are how to increase the working temperature and realize high Chern numbers (C > 1). Here, we report the experimental discovery of high-Chern-number QHE (C = 2) without Landau levels and C = 1 Chern insulator state displaying a nearly quantized Hall resistance plateau above the Néel temperature in MnBi2Te4 devices. Our observations provide a new perspective on topological matter and open new avenues for exploration of exotic topological quantum states and topological phase transitions at higher temperatures.
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Cites
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set
Kresse, G., & Furthmüller, J. (1996) · Physical Review B · doi:10.1103/physrevb.54.11169 · Cited by 123,652
Topological insulators and superconductors
Qi, X.-L., & Zhang, S.-C. (2011) · Reviews of Modern Physics · doi:10.1103/revmodphys.83.1057 · Cited by 14,394
Klitzing, K. V., Dorda, G., & Pepper, M. (1980) · Physical Review Letters · doi:10.1103/physrevlett.45.494 · Cited by 7,119
Quantized Hall Conductance in a Two-Dimensional Periodic Potential
Thouless, D. J., Kohmoto, M., Nightingale, M. P., & den Nijs, M. (1982) · Physical Review Letters · doi:10.1103/physrevlett.49.405 · Cited by 6,973 · cited 1×
“A nonzeroChern number distinguishes the QHE systems from vacuum with C = 0 [2,3].”
BackgroundHaldane, F. D. M. (1988) · Physical Review Letters · doi:10.1103/physrevlett.61.2015 · Cited by 6,301
Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator
Chang, C.-Z., Zhang, J., Feng, X., Shen, J., Zhang, Z., Guo, M., Li, K., Ou, Y., Wei, P., Wang, L.-L., et al. (2013) · Science · doi:10.1126/science.1234414 · Cited by 3,893
WannierTools: An open-source software package for novel topological materials
Wu, Q., Zhang, S., Song, H.-F., Troyer, M., & Soluyanov, A. A. (2018) · Computer Physics Communications · doi:10.1016/j.cpc.2017.09.033 · Cited by 2,724
Magnetic Oscillations in Metals
Shoenberg, D. (1984) · doi:10.1017/cbo9780511897870 · Cited by 2,328
Quantized Anomalous Hall Effect in Magnetic Topological Insulators
Yu, R., Zhang, W., Zhang, H.-J., Zhang, S.-C., Dai, X., & Fang, Z. (2010) · Science · doi:10.1126/science.1187485 · Cited by 2,267
Quantized Hall conductivity in two dimensions
Laughlin, R. B. (1981) · Physical Review B · doi:10.1103/physrevb.23.5632 · Cited by 2,162
Cited by
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
Recent progress on 2D magnets: Fundamental mechanism, structural design and modification
Jiang, X., Liu, Q., Xing, J., Liu, N., Guo, Y., Liu, Z., & Zhao, J. (2021) · Applied Physics Reviews · doi:10.1063/5.0039979 · Cited by 445
Emergent phenomena and proximity effects in two-dimensional magnets and heterostructures
Huang, B., McGuire, M. A., May, A. F., Xiao, D., Jarillo-Herrero, P., & Xu, X. (2020) · Nature Materials · doi:10.1038/s41563-020-0791-8 · Cited by 396
Metadata
- Authors
- Ge, J., Liu, Y., Li, J., Li, H., Luo, T., Wu, Y., Xu, Y., & Wang, J.
- Venue
- National Science Review
- Publisher
- Oxford University Press (OUP)
- Published
- 2020-04-30
- Volume
- 7
- Issue
- 8
- Pages
- 1280-1287
- ISSN
- 2053-714X (ISSN-L)
- 2095-5138
- OpenAlex
- W2964346366
- Cited by
- 371
- References
- 30
- FWCI
- 25.38
- Type
- journal article
- Language
- en
- Open access
- gold
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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