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arXiv · 0905.3906

Muon-spin rotation measurements of the penetration depth of the Mo_3Sb_7 superconductor

R. Khasanov·P. W. Klamut·A. Shengelaya·Z. Bukowski·I. M. Savić·C. Baines·H. Keller
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Abstract

Measurements of the magnetic field penetration depth λin superconductor Mo_3Sb_7 (T_c~2.1 K) were carried out by means of muon-spin-rotation. The absolute values of λ, the Ginzburg-Landau parameter κ, the first H_{c1} and the second H_{c2} critical fields at T=0 are λ(0)=720(100)nm, κ(0)=55(9), μ_0H_{c1}(0)=1.8(3)mT, and μ_0H_{c2}(0)=1.9(2)T. The zero temperature value of the superconducting energy gap Δ(0) was found to be 0.35(1)meV corresponding to the ratio 2Δ(0)/k_BT_c=3.83(10). At low temperatures λ^{-2}(T) saturates and becomes constant below T~0.3T_c, in agreement with what is expected for s-wave BCS superconductors. Our results suggest that Mo_3Sb_7 is a BCS superconductor with the isotropic energy gap

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R. Khasanov, P. W. Klamut, A. Shengelaya, Z. Bukowski, I. M. Savić, C. Baines, H. Keller. 2009-05-24. Muon-spin rotation measurements of the penetration depth of the Mo_3Sb_7 superconductor. https://doi.org/10.1103/physrevb.78.014502

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