Muon-spin rotation measurements of the penetration depth of the Mo3Sb7 superconductor

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

doi:10.1103/PhysRevB.78.014502

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Muon-spin rotation measurements of the penetration depth of the Mo3Sb7 superconductor

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

DOI 10.1103/PhysRevB.78.014502 · Physical Review B

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Abstract

Measurements of the magnetic-field penetration depth λ in superconductor Mo3Sb7 (Tc≃2.1 K) were carried out by means of muon-spin rotation. The absolute values of λ, the Ginzburg-Landau parameter κ, and the first Hc1 and the second Hc2 critical fields at T=0 are λ(0)=720(100) nm, κ(0)=55(10), μ0Hc1(0)=1.8(3) mT, and μ0Hc2(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)/kBTc=3.83(10). At low temperatures λ−2(T) saturates and becomes constant below T≃0.3Tc, in agreement with what is expected for s-wave BCS superconductors. Our results suggest that Mo3Sb7 is a superconductor with the single isotropic energy gap.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Mo3Sb7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	2.1	Pressure not reported	unknown