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

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

5 pages, 4 figures

References in corpus (6)

• Magnetic Penetration Depth in Unconventional Superconductors
• Evidence for complex order parameter in La_{1.83}Sr_{0.17}CuO_4
• Penetration depth study of superconducting gap structure of 2\textit{H}-NbSe${}_2$
• Universal observation of multiple order parameters in cuprate superconductors
• On the interpretation of muon-spin-rotation experiments in the mixed state of type-II superconductors
• Magnetic field dependence of the oxygen isotope effect on the magnetic penetration depth in hole-doped cuprate superconductors

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• Detailed investigation of the phase transition in K${}_x$P${}_4$W${}_8$O${}_{32}$ and experimental arguments for a charge density wave due to hidden nesting
• Comment on ``Muon-spin rotation studies of the superconducting properties of Mo_3Sb_7'', Phys.Rev.B 78, 172505 (2008)