The strain effect on superconductivity in phosphorene: A first-principles prediction

Yanfeng Ge, Wenhui Wan, Fan Yang, Yugui Yao

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Abstract

The effects of biaxial and uniaxial strains on electron-phonon coupling and superconductivity in monolayer phosphorene are systematically investigated by first-principles calculations. It is found that the electron-phonon coupling primarily comes from the low frequency optical phonon modes aroundB3g 1 , and the biaxial strain gives rise to more a obvious increase in density of states around the Fermi level and phonon softening in the low frequency regime compared to the other two types of uniaxial strain. Therefore, the electron-phonon coupling is more significantly enhanced by the biaxial strain than the uniaxial strains and the superconducting transition temperature Tc increases sharply from 3 Kto 16 Kat the typical doping concentration n2D = 3.0 × 1014cm-2 when the biaxial strain reaches 4.0%.

Original languageEnglish
Article number035008
JournalNew Journal of Physics
Volume17
DOIs
Publication statusPublished - 12 Mar 2015

Keywords

  • electron-phonon coupling
  • phosphorene
  • strain
  • superconductivity

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Ge, Y., Wan, W., Yang, F., & Yao, Y. (2015). The strain effect on superconductivity in phosphorene: A first-principles prediction. New Journal of Physics, 17, Article 035008. https://doi.org/10.1088/1367-2630/17/3/035008