Phys. Rev. Lett. 94, 017004 (2005) [4 pages]Influence of High Magnetic Fields on the Superconducting Transition of One-Dimensional Nb and MoGe NanowiresReceived 8 June 2004; published 13 January 2005 The effects of a strong magnetic field on superconducting Nb and MoGe nanowires with diameter ∼10 nm have been studied. We have found that the Langer-Ambegaokar-McCumber-Halperin (LAMH) theory of thermally activated phase slips is applicable in a wide range of magnetic fields and describes well the temperature dependence of the wire resistance, over 11 orders of magnitude. The field dependence of the critical temperature, Tc, extracted from the LAMH fits is in good quantitative agreement with the theory of pair-breaking perturbations that takes into account both spin and orbital contributions. The extracted spin-orbit scattering time agrees with an estimate τs.o.≃τ(ℏc/Ze2)4, where τ is the elastic scattering time and Z is the atomic number. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.017004
DOI:
10.1103/PhysRevLett.94.017004
PACS:
74.78.Na, 74.25.Fy, 74.25.Ha, 74.40.+k
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