Superconductivity in few-layer stanene [electronic resource]
Superconducting Properties And Materials; Topological Matter.
Saved in:
| Online Access: |
Online Access (via OSTI) |
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| Corporate Author: | |
| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C. : Oak Ridge, Tenn. :
United States. Department of Energy. Office of Basic Energy Sciences ; distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
2018.
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| Subjects: |
| Summary: | Superconducting Properties And Materials; Topological Matter. |
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| 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. |
| Item Description: | Published through SciTech Connect. 01/15/2018. ": 31" Nature Physics 14 4 ISSN 1745-2473 AM. Menghan Liao; Yunyi Zang; Zhaoyong Guan; Haiwei Li; Yan Gong; Kejing Zhu; Xiao-Peng Hu; Ding Zhang; Yong Xu; Ya-Yu Wang; Ke He; Xu-Cun Ma; Shou-Cheng Zhang; Qi-Kun Xue. Beijing Innovation Center for Future Chip (ICFC) Tsinghua Univ., Beijing (China) Thousand-Young-Talents Program (China) |
| Physical Description: | p. 344-348 : digital, PDF file. |