Superconducting properties and μSR study of the noncentrosymmetric superconductor Nb0.5Os0.5

被引：24
|
作者：
Singh, D. [1 ]
Barker, J. A. T. [2 ]
Thamizhavel, A. [3 ]
Hillier, A. D. [4 ]
Paul, D. McK [2 ]
Singh, R. P. [1 ]
机构：
[1] Indian Inst Sci Educ & Res Bhopal, Bhopal 462066, India
[2] Univ Warwick, Phys Dept, Coventry CV4 7AL, W Midlands, England
[3] Tata Inst Fundamental Res, Dept Condensed Matter Phys & Mat Sci, Bombay 400005, Maharashtra, India
[4] STFC Rutherford Appleton Lab, ISIS Facil, Harwell Sci & Innovat Campus, Didcot OX11 0QX, Oxon, England
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2018年 / 30卷 / 07期
关键词：
noncentrosymmetric superconductors; mu SR; unconventional superconductors; CRITICAL-FIELD HC2; SPIN RELAXATION; PURITY DEPENDENCE; PENETRATION DEPTH; ZERO-FIELD; TEMPERATURE; UPT3; TC;
D O I：
10.1088/1361-648X/aaa376
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The properties of the noncentrosymmetric superconductor (alpha-Mn structure) Nb0.5Os0.5 have been investigated using resistivity, magnetization, specific heat, and muon spin relaxation and rotation (mu SR) measurements. These measurements suggest that Nb0.5Os0.5 is a weakly coupled (lambda(e-ph) similar to 0.53) type-II superconductor (kappa(GL) approximate to 61), having a bulk superconducting transition temperature T-c = 3.07 K. The specific heat data fits well with the single-gap BCS model indicating nodeless s-wave superconductivity in Nb0.5Os0.5. The mu SR measurements also confirm s-wave superconductivity with the preserved time-reversal symmetry.
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页数：8
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