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Título: | Quantum Spin Hall Effect in Two-Dimensional Crystals of Transition-Metal Dichalcogenides |
Autor: | Cazalilla, M. A; Ochoa, Héctor; Guinea, F. CSIC ORCID | Fecha de publicación: | 15-ago-2014 | Editor: | American Physical Society | Citación: | Physical Review Letters 113(7): 077201 (2014) | Resumen: | We propose to engineer time-reversal-invariant topological insulators in two-dimensional crystals of transition-metal dichalcogenides (TMDCs). We note that, at low doping, semiconducting TMDCs under shear strain will develop spin-polarized Landau levels residing in different valleys. We argue that gaps between Landau levels in the range of 10-100 K are within experimental reach. In addition, we point out that a superlattice arising from a moire pattern can lead to topologically nontrivial subbands. As a result, the edge transport becomes quantized, which can be probed in multiterminal devices made using strained 2D crystals and/or heterostructures. The strong d character of valence and conduction bands may also allow for the investigation of the effects of electron correlations on the topological phases. | Versión del editor: | https://doi.org/10.1103/PhysRevLett.113.077201 | URI: | http://hdl.handle.net/10261/181717 | DOI: | 10.1103/PhysRevLett.113.077201 | Identificadores: | doi: 10.1103/PhysRevLett.113.077201 issn: 0031-9007 e-issn: 1079-7114 |
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