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. Our experimental findings open up novel strategies for constructing two-dimensional topological superconductors.
Description
Superconductivity in few-layer stanene | Nature Physics
%0 Journal Article
%1 liao2018superconductivity
%A Liao, Menghan
%A Zang, Yunyi
%A Guan, Zhaoyong
%A Li, Haiwei
%A Gong, Yan
%A Zhu, Kejing
%A Hu, Xiao-Peng
%A Zhang, Ding
%A Xu, Yong
%A Wang, Ya-Yu
%A He, Ke
%A Ma, Xu-Cun
%A Zhang, Shou-Cheng
%A Xue, Qi-Kun
%D 2018
%J Nature Physics
%K mbl
%R 10.1038/s41567-017-0031-6
%T Superconductivity in few-layer stanene
%U https://doi.org/10.1038/s41567-017-0031-6
%X 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. Our experimental findings open up novel strategies for constructing two-dimensional topological superconductors.
@article{liao2018superconductivity,
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. Our experimental findings open up novel strategies for constructing two-dimensional topological superconductors.},
added-at = {2018-01-25T11:25:13.000+0100},
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},
biburl = {https://www.bibsonomy.org/bibtex/26877d3894b902294104cbd23341fee30/walter_hahn},
description = {Superconductivity in few-layer stanene | Nature Physics},
doi = {10.1038/s41567-017-0031-6},
interhash = {8d83d52cb158f81c6a6f544aff25df48},
intrahash = {6877d3894b902294104cbd23341fee30},
issn = {17452481},
journal = {Nature Physics},
keywords = {mbl},
refid = {Liao2018},
timestamp = {2018-01-25T11:25:13.000+0100},
title = {Superconductivity in few-layer stanene},
url = {https://doi.org/10.1038/s41567-017-0031-6},
year = 2018
}