Prediction of phonon-mediated superconductivity in hole-doped black phosphorus

被引：5

作者：

Feng, Yanqing ^{[1
]}

Sun, Hongyi ^{[2
,3
,4
,5
]}

Sun, Junhui ^{[6
]}

Lu, Zhibin ^{[6
]}

You, Yong ^{[1
]}

机构：

[1] Beijing Inst Technol Zhuhai, Sch Appl Sci & Civil Engn, Zhuhai 519085, Peoples R China

[2] South Univ Sci & Technol China, Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China

[3] South Univ Sci & Technol China, Dept Phys, Shenzhen 518055, Peoples R China

[4] Southeast Univ, Sch Phys, Nanjing 211189, Jiangsu, Peoples R China

[5] Shenzhen Key Lab Quantum Sci & Engn, Shenzhen 518055, Peoples R China

[6] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Gansu, Peoples R China

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2018年 / 30卷 / 01期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

hole-doped black phosphorus; BCS superconductivity; density functional calculations; TRANSITION-TEMPERATURE; ELECTRONIC-STRUCTURE; OPTOELECTRONICS; INSULATOR;

D O I：

10.1088/1361-648X/aa9a5f

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We study the conventional electron-phonon mediated superconducting properties of hole-doped black phosphorus by density functional calculations and get quite a large electron-phonon coupling (EPC) constant lambda similar to 1.0 with transition temperature T-C similar to 10 K, which is comparable to MgB2 when holes are doped into the degenerate and nearly flat energy bands around the Fermi level. We predict that the softening of low-frequency B-3g(1) optical mode and its phonon displacement, which breaks the lattice nonsymmorphic symmetry of gliding plane and lifts the band double degeneracy, lead to a large EPC. These factors are favorable for BCS superconductivity.

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页数：6

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