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Quantum fluctuations and density of states in low-dimensional superconductors

  • Alexey A. RadkevichEmail author
  • Andrew G. Semenov
  • Andrei D. Zaikin
Regular Article
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Part of the following topical collections:
  1. Non-equilibrium Dynamics: Quantum Systems and Foundations of Quantum Mechanics

Abstract

We investigate the influence of quantum phase fluctuations on electron density of states (DOS) in ultrathin superconducting films and nanowires. Using an effective action approach we derive a non-perturbative correction to DOS in such systems. The main effect of phase fluctuations in quasi-two-dimensional films is the appearance of electron states at subgap energies while in quasi-one-dimensional nanowires fluctuations also lead to smearing of the gap edge singularity in DOS.

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Copyright information

© EDP Sciences, Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Alexey A. Radkevich
    • 1
    Email author
  • Andrew G. Semenov
    • 1
    • 2
  • Andrei D. Zaikin
    • 1
    • 3
  1. 1.I.E. Tamm Department of Theoretical Physics, P.N. Lebedev Physical InstituteMoscowRussia
  2. 2.National Research University Higher School of EconomicsMoscowRussia
  3. 3.Institute of Nanotechnology, Karlsruhe Institute of Nanotechnology (KIT)KarlsruheGermany

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