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Fluctuation-induced magnetotransport of superconductors in the quasiballistic regime

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Abstract:

We study the fluctuation-induced magnetotransport of a two-dimensional superconductor in the quasiballistic regime, where ξ GL(T) ≪ ℓ (ℓ is the electron mean free path and ξ GL(T) is the Ginzburg-Landau coherence length). The magnetoconductivity is evaluated in the nonlocal fluctuation regime thereby extending the existing theory valid in the local limit. We show that the Maki-Thompson (MT) and density-of-states (DOS) contributions strongly compensate each other and their sum is negligible in comparison with the Aslamazov-Larkin (AL) term. The hierarchy of the fluctuation contributions to the magnetoconductivity in the high-field limit is also qualitatively discussed.

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Authors and Affiliations

  1. INFM and Dipartimento di Fisica, Università di Roma Tre, Via della vasca Navale 84, 00146 Roma, Italy, , , , , , IT

    G. Savona

  2. Moscow State Institute of Steel and Alloys (Technological University), Leninsky prospect 4, 119991 Moscow, Russia, , , , , , RU

    D.V. Livanov

  3. COHERENTIA-INFM UdR “Tor Vergata”, viale del Politecnico, 1, 00133 Roma, Italy, , , , , , IT

    A.A. Varlamov

Authors
  1. G. Savona
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  2. D.V. Livanov
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  3. A.A. Varlamov
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Received 10 July 2002 / Received in final form 21 November 2002 Published online 7 May 2003

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Savona, G., Livanov, D. & Varlamov, A. Fluctuation-induced magnetotransport of superconductors in the quasiballistic regime. Eur. Phys. J. B 32, 415–420 (2003). https://doi.org/10.1140/epjb/e2003-00124-5

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  • DOI: https://doi.org/10.1140/epjb/e2003-00124-5

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