Possibility of realizing quantum spin Hall effect at room temperature in
Abstract
Two-dimensional quantum spin Hall (QSH) insulators with reasonably wide band gaps are imperative for the development of various innovative technologies. Through systematic density functional calculations and tight-binding simulations, we found that stanene on an -alumina surface may possess a sizeable topologically nontrivial band gap at the point. Furthermore, stanene is atomically bonded to but electronically decoupled from the substrate, providing high structural stability and isolated QSH states to a large extent. We conclude the underlying physical mechanism is rather general, and this finding may lead to the opening of a new vista for the exploration of QSH insulators for room temperature device applications.
- Authors:
-
- Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy; Fudan Univ., Shanghai (China)
- Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy
- Fudan Univ., Shanghai (China)
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES); Univ. of California, Irvine, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1388926
- Alternate Identifier(s):
- OSTI ID: 1260438
- Grant/Contract Number:
- SC0012670; FG02-05ER46237
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 94; Journal Issue: 3; Related Information: SHINES partners with University of California, Riverside (lead); Arizona State University; Colorado State University; Johns Hopkins University; University of California Irvine; University of California Los Angeles; University of Texas at Austin; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; phonons; thermal conductivity; thermoelectric; spin dynamics; spintronics
Citation Formats
Wang, Hui, Pi, S. T., Kim, J., Wang, Z., Fu, H. H., and Wu, R. Q. Possibility of realizing quantum spin Hall effect at room temperature in stanene/Al2O3(0001). United States: N. p., 2016.
Web. doi:10.1103/PhysRevB.94.035112.
Wang, Hui, Pi, S. T., Kim, J., Wang, Z., Fu, H. H., & Wu, R. Q. Possibility of realizing quantum spin Hall effect at room temperature in stanene/Al2O3(0001). United States. https://doi.org/10.1103/PhysRevB.94.035112
Wang, Hui, Pi, S. T., Kim, J., Wang, Z., Fu, H. H., and Wu, R. Q. Wed .
"Possibility of realizing quantum spin Hall effect at room temperature in stanene/Al2O3(0001)". United States. https://doi.org/10.1103/PhysRevB.94.035112. https://www.osti.gov/servlets/purl/1388926.
@article{osti_1388926,
title = {Possibility of realizing quantum spin Hall effect at room temperature in stanene/Al2O3(0001)},
author = {Wang, Hui and Pi, S. T. and Kim, J. and Wang, Z. and Fu, H. H. and Wu, R. Q.},
abstractNote = {Two-dimensional quantum spin Hall (QSH) insulators with reasonably wide band gaps are imperative for the development of various innovative technologies. Through systematic density functional calculations and tight-binding simulations, we found that stanene on an α-alumina surface may possess a sizeable topologically nontrivial band gap (~0.25eV) at the Γ point. Furthermore, stanene is atomically bonded to but electronically decoupled from the substrate, providing high structural stability and isolated QSH states to a large extent. We conclude the underlying physical mechanism is rather general, and this finding may lead to the opening of a new vista for the exploration of QSH insulators for room temperature device applications.},
doi = {10.1103/PhysRevB.94.035112},
journal = {Physical Review B},
number = 3,
volume = 94,
place = {United States},
year = {Wed Jul 06 00:00:00 EDT 2016},
month = {Wed Jul 06 00:00:00 EDT 2016}
}
Web of Science
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