中国物理B ›› 2016, Vol. 25 ›› Issue (2): 27402-027402.doi: 10.1088/1674-1056/25/2/027402

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Superconductivity of bilayer phosphorene under interlayer compression

Gui-Qin Huang(黄桂芹) and Zhong-Wen Xing(邢钟文)   

  1. 1. Department of Physics, Nanjing Normal University, Nanjing 210023, China;
    2. National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, China
  • 收稿日期:2015-09-14 修回日期:2015-10-29 出版日期:2016-02-05 发布日期:2016-02-05
  • 通讯作者: Zhong-Wen Xing E-mail:zwxing@nju.edu.cn
  • 基金资助:

    Project supported by the State Key Program for Basic Researches of China (Grant No. 2014CB921103) and the Natural Science Foundation of Jiangsu Province, China (Grant Nos. BK20141441 and BK2010012).

Superconductivity of bilayer phosphorene under interlayer compression

Gui-Qin Huang(黄桂芹)1 and Zhong-Wen Xing(邢钟文)2   

  1. 1. Department of Physics, Nanjing Normal University, Nanjing 210023, China;
    2. National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, China
  • Received:2015-09-14 Revised:2015-10-29 Online:2016-02-05 Published:2016-02-05
  • Contact: Zhong-Wen Xing E-mail:zwxing@nju.edu.cn
  • Supported by:

    Project supported by the State Key Program for Basic Researches of China (Grant No. 2014CB921103) and the Natural Science Foundation of Jiangsu Province, China (Grant Nos. BK20141441 and BK2010012).

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摘要：

According to first-principles calculations, it is our prediction that bilayer phosphorene (BLP) will become a quasi-two-dimensional superconductor under a certain degree of interlayer compression. A decreasing interlayer distance may realize the transition in the BLP from a semiconducting phase to a metallic phase. On the other hand, a severe vertical compression may make the BLP lattice become dynamically unstable. It is found that in the stable metallic phase of the BLP, interlayer phonon modes dominate the electron-phonon coupling λ. The obtained λ can be greater than 1 and the superconducting temperature Tc can be higher than 10 K.

关键词: bilayer phosphorene, superconductivity, electron-phonon coupling, semiconductor-metal transition

Abstract:

According to first-principles calculations, it is our prediction that bilayer phosphorene (BLP) will become a quasi-two-dimensional superconductor under a certain degree of interlayer compression. A decreasing interlayer distance may realize the transition in the BLP from a semiconducting phase to a metallic phase. On the other hand, a severe vertical compression may make the BLP lattice become dynamically unstable. It is found that in the stable metallic phase of the BLP, interlayer phonon modes dominate the electron-phonon coupling λ. The obtained λ can be greater than 1 and the superconducting temperature Tc can be higher than 10 K.

Key words: bilayer phosphorene, superconductivity, electron-phonon coupling, semiconductor-metal transition

中图分类号:  (Superconducting films and low-dimensional structures)

  • 74.78.-w
71.30.+h (Metal-insulator transitions and other electronic transitions) 74.62.Fj (Effects of pressure) 63.20.kd (Phonon-electron interactions)