Electron-doped phosphorene: A potential monolayer superconductor

D. F. Shao; W. J. Lu; H. Y. Lv; Y. P. Sun

doi:10.1209/0295-5075/108/67004

All issues

Volume 108 / No 6 (December 2014)

EPL, 108 6 (2014) 67004

Abstract

Issue		EPL Volume 108, Number 6, December 2014


Article Number		67004
Number of page(s)		6
Section		Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI		https://doi.org/10.1209/0295-5075/108/67004
Published online		23 December 2014

EPL, 108 (2014) 67004

Electron-doped phosphorene: A potential monolayer superconductor

D. F. Shao¹, W. J. Lu¹^(a), H. Y. Lv¹ and Y. P. Sun¹^,2^,3^(b)

¹ Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences Hefei 230031, PRC
² High Magnetic Field Laboratory, Chinese Academy of Sciences - Hefei 230031, PRC
³ Collaborative Innovation Center of Advanced Microstructures, Nanjing University - Nanjing 210093, PRC

^(a) wjlu@issp.ac.cn
^(b) ypsun@issp.ac.cn

Received: 1 September 2014
Accepted: 3 December 2014

Abstract

We predict by first-principles calculations that the electron-doped phosphorene is a potential BCS-like superconductor. The stretching modes at the Brillouin-zone center are remarkably softened by the electron-doping, which results in the strong electron-phonon coupling. The superconductivity can be introduced by a doped electron density $(n_{2D})$ above $1.3 \times10^{14}\ \text{cm}^{-2}$ , and may exist over the liquid-helium temperature when $n_{2D}>2.6 \times10^{14}\ \text{cm}^{-2}$ . The superconductivity can be significantly tuned and enhanced by applying tensile strain. The maximum critical temperature of electron-doped phosphorene is predicted to be higher than 10 K. The superconductivity of phosphorene will significantly broaden the applications of this novel material.

PACS: 74.78.Na – Mesoscopic and nanoscale systems / 73.22.-f – Electronic structure of nanoscale materials and related systems / 63.20.kd – Phonon-electron interactions

© EPLA, 2014

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