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


Khasanov, R; Klamut, P W; Shengelaya, A; Bukowski, Z; Savic, I M; Baines, C; Keller, H (2008). Muon-spin rotation measurements of the penetration depth of the Mo3Sb7 superconductor. Physical Review. B, Condensed Matter and Materials Physics, 78(1):014502.

Abstract

Measurements of the magnetic-field penetration depth lambda in superconductor Mo3Sb7 (Tc~=2.1 K) were carried out by means of muon-spin rotation. The absolute values of lambda, the Ginzburg-Landau parameter kappa, and the first Hc1 and the second Hc2 critical fields at T=0 are lambda(0)=720(100) nm, kappa(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 Delta(0) was found to be 0.35(1) meV, corresponding to the ratio 2Delta(0)/kBTc=3.83(10). At low temperatures lambda−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.

Measurements of the magnetic-field penetration depth lambda in superconductor Mo3Sb7 (Tc~=2.1 K) were carried out by means of muon-spin rotation. The absolute values of lambda, the Ginzburg-Landau parameter kappa, and the first Hc1 and the second Hc2 critical fields at T=0 are lambda(0)=720(100) nm, kappa(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 Delta(0) was found to be 0.35(1) meV, corresponding to the ratio 2Delta(0)/kBTc=3.83(10). At low temperatures lambda−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.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2008
Deposited On:17 Feb 2009 16:57
Last Modified:05 Apr 2016 13:00
Publisher:American Physical Society
ISSN:1098-0121
Publisher DOI:10.1103/PhysRevB.78.014502
Related URLs:http://arxiv.org/abs/0905.3906
Permanent URL: http://doi.org/10.5167/uzh-13707

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