摘要
Based on the first-principles density functional theory electronic structure calculation,we investigate the possible phonon-mediated superconductivity in arsenene,a two-dimensional buckled arsenic atomic sheet,under electron doping.We find that the strong superconducting pairing interaction results mainly from the pz-like electrons of arsenic atoms and the A1 phonon mode around the K point,and the superconducting transition temperature can be as high as 30.8 K in the arsenene with 0.2 doped electrons per unit cell and 12%-applied biaxial tensile strain.This transition temperature is about ten times higher than that in the bulk arsenic under high pressure.It is also the highest transition temperature that is predicted for electron-doped two-dimensional elemental superconductors,including graphene,silicene,phosphorene,and borophene.
Based on the first-principles density functional theory electronic structure calculation,we investigate the possible phonon-mediated superconductivity in arsenene,a two-dimensional buckled arsenic atomic sheet,under electron doping.We find that the strong superconducting pairing interaction results mainly from the pz-like electrons of arsenic atoms and the A1 phonon mode around the K point,and the superconducting transition temperature can be as high as 30.8 K in the arsenene with 0.2 doped electrons per unit cell and 12%-applied biaxial tensile strain.This transition temperature is about ten times higher than that in the bulk arsenic under high pressure.It is also the highest transition temperature that is predicted for electron-doped two-dimensional elemental superconductors,including graphene,silicene,phosphorene,and borophene.
作者
孔鑫
高淼
闫循旺
卢仲毅
向涛
Xin Kong;Miao Gao;Xun-Wang Yan;Zhong-Yi Lu;Tao Xiang(Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;Department of Microelectronics Science and Engineering, Faculty of Science, Ningbo University, Ningbo 315211, China;College of Physics and Engineering, Qufu Normal University, Qufu 273165, China;Department of Physics, Renmin University of China, Beijing 100872, China;Collaborative lnnovation Center of Quantum Matter, Beijing 100190, China)
基金
Project supported by the National Key Research and Development Program of China(Grant No.2017YFA0302901)
the National Natural Science Foundation of China(Grant Nos.11474331,11404383,and 11474004)
the Natural Science Foundation of Zhejiang Province,China(Grant No.LY17A040005)
the K.C.Wong Magna Fund in Ningbo University
