Journal
PHYSICAL REVIEW B
Volume 90, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.90.121408
Keywords
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Funding
- Ministry of Science and Technology of China [2011CB606405, 2011CB921901]
- National Natural Science Foundation of China [11334006]
- European Research Council [267374]
- Grupos Consolidados UPV/EHU del Gobierno Vasco [IT578-13]
- EC project CRONOS [280879-2 CRONOS CP-FP7]
- Defense Advanced Research Projects Agency Microsystems Technology Office, MesoDynamic Architecture Program (MESO) [N66001-11-1-4105]
- MARCO
- DARPA
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From density functional theory within the generalized gradient approximation we predict a structure of stanene with dumbbell units (DBs), and show that it is a two-dimensional topological insulator with an inverted band gap which can be tuned by compressive strain. Furthermore, we propose that the boron nitride sheet and reconstructed (2x2) InSb(111) surfaces are ideal substrates for the experimental realization of DB stanene, maintaining its nontrivial topology. Combined with standard semiconductor technologies, such as magnetic doping and electrical gating, the quantum anomalous Hall effect, Chern half metallicity, and topological superconductivity can be realized in DB stanene on those substrates. These properties make the two-dimensional supported stanene a good platform for the study of quantum spin Hall insulators as well as other exotic quantum states of matter.
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