Influence of high magnetic fields on the superconducting transition of one-dimensional Nb and MoGe nanowires

A. Rogachev; A. T. Bollinger; A. Bezryadin

doi:10.1103/PhysRevLett.94.017004

Influence of high magnetic fields on the superconducting transition of one-dimensional Nb and MoGe nanowires

A. Rogachev, A. T. Bollinger, A. Bezryadin

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Abstract

The effects of a strong magnetic field on superconducting Mb 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, T_c, 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 τ_s.o ≃ τ(ℏc/Ze²)⁴, where τ is the elastic scattering time and Z is the atomic number.

Original language	English (US)
Article number	017004
Journal	Physical review letters
Volume	94
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevLett.94.017004
State	Published - Jan 14 2005

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General Physics and Astronomy

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abstract = "The effects of a strong magnetic field on superconducting Mb 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.",

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AB - The effects of a strong magnetic field on superconducting Mb 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.

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Influence of high magnetic fields on the superconducting transition of one-dimensional Nb and MoGe nanowires

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