2008/07/02 by R. Khasanov, P. W. Klamut, A. Shengelaya +5 · 39 citations
Chemistry · Materials Science · Physics and Astronomy · #Analytical Chemistry (journal) #Chemistry #Condensed matter physics #Iron-based superconductors research #Lambda #London penetration depth #Muon #Muon spin spectroscopy #Nuclear physics #Penetration depth #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Rare-earth and actinide compounds #Superconductivity #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.78.014502
published in Physical Review B 78(1) (American Physical Society) · 5 pages, 4 figures
openalex publication_date 2008/07/02 · arxiv created 2009/05/24 · arxiv updated 2015/05/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Measurements of the magnetic-field penetration depth \ensuremathλ in superconductor Mo3Sb7 (Tc\ensuremath≃2.1 K) were carried out by means of muon-spin rotation. The absolute values of \ensuremathλ, the Ginzburg-Landau parameter \ensuremathκ, and the first Hc1 and the second Hc2 critical fields at T=0 are \ensuremathλ(0)=720(100) nm, \ensuremathκ(0)=55(10), \ensuremathμ0Hc1(0)=1.8(3) mT, and \ensuremathμ0Hc2(0)=1.9(2) T. The zero-temperature value of the superconducting energy gap \ensuremathΔ(0) was found to be 0.35(1) meV, corresponding to the ratio 2\ensuremathΔ(0)/kBTc=3.83(10). At low temperatures \ensuremathλ^\ensuremath-2(T) saturates and becomes constant below T\ensuremath≃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.