Journal
PHYSICAL REVIEW B
Volume 87, Issue 23, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.87.235420
Keywords
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Funding
- National Natural Science Foundation of China [10974076, 11274151, 11147007, 11204120]
- Open Research Fund Program of the State Key Laboratory of Low-Dimensional Quantum Physics [20120924]
- Key Disciplines of Condensed Matter Physics of Linyi University
- US DOE-BES [DE-FG02-04ER46148]
- ARL [W911NF-12-2-0023]
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Using first-principles and Wannier function methods, we systematically calculate the electronic band structure and topological edge states of single bilayer Bi (111) film (BL-Bi) as a function of strain and perpendicular electric field to investigate the effects induced by lattice mismatch and interfacial charge transfer when BL-Bi is epitaxially grown on a substrate. We found that the BL-Bi remains with a finite band gap and a nontrivial band topology for strains up to +/- 6% and electric fields up to 0.8 eV/angstrom. This indicates that the BL-Bi is a robust two-dimensional topological insulator against strain and electrical field on a substrate.
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