Superconductivity in few-layer stanene
Abstract
A single atomic slice of α-tin—stanene—has been predicted to host the quantum spin Hall effect at room temperature, offering an ideal platform to study low-dimensional and topological physics. Although recent research has focused on monolayer stanene, the quantum size effect in few-layer stanene could profoundly change material properties, but remains unexplored. By exploring the layer degree of freedom, we discover superconductivity in few-layer stanene down to a bilayer grown on PbTe, while bulk α-tin is not superconductive. Through substrate engineering, we further realize a transition from a single-band to a two-band superconductor with a doubling of the transition temperature. In situ angle-resolved photoemission spectroscopy (ARPES) together with first-principles calculations elucidate the corresponding band structure. The theory also indicates the existence of a topologically non-trivial band. Thus, our experimental findings open up novel strategies for constructing two-dimensional topological superconductors.
- Authors:
-
- Tsinghua Univ., Beijing (China). State Key Lab. of Low-Dimensional Quantum Physics and Dept. of Physics
- Tsinghua Univ., Beijing (China). State Key Lab. of Low-Dimensional Quantum Physics and Dept. of Physics; Collaborative Innovation Center of Quantum Matter (CICQM), Beijing (China)
- Tsinghua Univ., Beijing (China). State Key Lab. of Low-Dimensional Quantum Physics and Dept. of Physics; Collaborative Innovation Center of Quantum Matter (CICQM), Beijing (China); RIKEN Center for Emergent Matter Science (CEMS), Saitama (Japan)
- Stanford Univ., CA (United States). Dept. of Physics
- Publication Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; Ministry of Science and Technology (MOST) (China); National Natural Science Foundation of China (NSFC); Beijing Innovation Center for Future Chip (ICFC); Tsinghua Univ., Beijing (China); Thousand-Young-Talents Program (China)
- OSTI Identifier:
- 1438571
- Grant/Contract Number:
- AC02-76SF00515; 2017YFA0304600; 2017YFA0302902; 11604176
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Nature Physics
- Additional Journal Information:
- Journal Volume: 14; Journal Issue: 4; Journal ID: ISSN 1745-2473
- Publisher:
- Nature Publishing Group (NPG)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; Superconducting properties and materials; Topological matter
Citation Formats
Liao, Menghan, Zang, Yunyi, Guan, Zhaoyong, Li, Haiwei, Gong, Yan, Zhu, Kejing, Hu, Xiao-Peng, Zhang, Ding, Xu, Yong, Wang, Ya-Yu, He, Ke, Ma, Xu-Cun, Zhang, Shou-Cheng, and Xue, Qi-Kun. Superconductivity in few-layer stanene. United States: N. p., 2018.
Web. doi:10.1038/s41567-017-0031-6.
Liao, Menghan, Zang, Yunyi, Guan, Zhaoyong, Li, Haiwei, Gong, Yan, Zhu, Kejing, Hu, Xiao-Peng, Zhang, Ding, Xu, Yong, Wang, Ya-Yu, He, Ke, Ma, Xu-Cun, Zhang, Shou-Cheng, & Xue, Qi-Kun. Superconductivity in few-layer stanene. United States. https://doi.org/10.1038/s41567-017-0031-6
Liao, Menghan, Zang, Yunyi, Guan, Zhaoyong, Li, Haiwei, Gong, Yan, Zhu, Kejing, Hu, Xiao-Peng, Zhang, Ding, Xu, Yong, Wang, Ya-Yu, He, Ke, Ma, Xu-Cun, Zhang, Shou-Cheng, and Xue, Qi-Kun. 2018.
"Superconductivity in few-layer stanene". United States. https://doi.org/10.1038/s41567-017-0031-6. https://www.osti.gov/servlets/purl/1438571.
@article{osti_1438571,
title = {Superconductivity in few-layer stanene},
author = {Liao, Menghan and Zang, Yunyi and Guan, Zhaoyong and Li, Haiwei and Gong, Yan and Zhu, Kejing and Hu, Xiao-Peng and Zhang, Ding and Xu, Yong and Wang, Ya-Yu and He, Ke and Ma, Xu-Cun and Zhang, Shou-Cheng and Xue, Qi-Kun},
abstractNote = {A single atomic slice of α-tin—stanene—has been predicted to host the quantum spin Hall effect at room temperature, offering an ideal platform to study low-dimensional and topological physics. Although recent research has focused on monolayer stanene, the quantum size effect in few-layer stanene could profoundly change material properties, but remains unexplored. By exploring the layer degree of freedom, we discover superconductivity in few-layer stanene down to a bilayer grown on PbTe, while bulk α-tin is not superconductive. Through substrate engineering, we further realize a transition from a single-band to a two-band superconductor with a doubling of the transition temperature. In situ angle-resolved photoemission spectroscopy (ARPES) together with first-principles calculations elucidate the corresponding band structure. The theory also indicates the existence of a topologically non-trivial band. Thus, our experimental findings open up novel strategies for constructing two-dimensional topological superconductors.},
doi = {10.1038/s41567-017-0031-6},
url = {https://www.osti.gov/biblio/1438571},
journal = {Nature Physics},
issn = {1745-2473},
number = 4,
volume = 14,
place = {United States},
year = {Mon Jan 15 00:00:00 EST 2018},
month = {Mon Jan 15 00:00:00 EST 2018}
}
Web of Science
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