Nodeless superconductivity in a quasi-two-dimensional superconductor AuTe2Se4/3

被引：3

作者：

Jia, Xiao-Yu ^{[1
,2
]}

Yu, Yun-Jie ^{[1
,2
]}

Chen, Xu ^{[3
]}

Guo, Jian-Gang ^{[3
]}

Ying, Tian-Ping ^{[1
,2
]}

He, Lan-Po ^{[1
,2
]}

Chen, Xiao-Long ^{[3
,4
,5
]}

Li, Shi-Yan ^{[1
,2
,6
]}

机构：

[1] Fudan Univ, Dept Phys, State Key Lab Surface Phys, Shanghai 200433, Peoples R China

[2] Fudan Univ, Adv Mat Lab, Shanghai 200433, Peoples R China

[3] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China

[4] Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China

[5] Collaborat Innovat Ctr Quantum Matter, Beijing 100084, Peoples R China

[6] Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China

来源：

CHINESE PHYSICS B | 2018年 / 27卷 / 06期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

superconductivity; thermal transport measurement; gap structure; two-dimensional material; UNCONVENTIONAL SUPERCONDUCTIVITY; MAGNETIC-FIELD; TRANSITION; ALLOYS; FILMS; OXIDES; SERIES;

D O I：

10.1088/1674-1056/27/6/067401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We performed ultra-low temperature thermal conductivity measurements on the single crystal of a new gold-based quasi-two-dimensional superconductor AuTe2Se4/3, which has a superconducting transition temperature Tc = 2.70 K. A negligible residual linear term k(0)/T in zero magnetic field is observed, which suggests fully gapped superconducting state. Furthermore, the field dependence of k(0)/T is similar to that of the multi-band s-wave superconductor BaFe1.9Ni0.1As2 at low field. These results reveal multiple nodeless superconducting gaps in this interesting quasi-two-dimensional superconductor with Berezinsky-Kosterlitz-Thouless topological transition.

引用

页数：5

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