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This article is cited in 3 scientific papers (total in 3 papers)
XX International Symposium "Nanophysics and Nanoelectronics", Nizhny Novgorod, March 13-16, 2017
Superconductivity
Density of states of narrow superconducting channels in the regime of quantum fluctuations of the order parameter
K. Yu. Arutyunovab, J. S. Lehtinenc, A. A. Radkevichde, A. G. Semenovde, A. D. Zaikindf a Moscow Institute of Electronics and Mathematics, National Research University "Higher School of Economics", Moscow, Russia
b P. L. Kapitza Institute for Physical Problems, Russian Academy of Sciences, Moscow
c VTT Technical Research Centre of Finland Ltd., Centre for Metrology MIKES, Finland
d Tamm Theory Department, Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia
e Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region
f Institute of Nanotechnology, Karlsruhe Institute of Technology, Karlsruhe, Germany
Abstract:
The current–voltage characteristics of superconductor–insulator–semiconductor (S$_1$–I–S$_2$) tunnel junctions, where superconducting electrode S$_2$ is a thin nanowire, are studied experimentally. The observed blurring of the gap singularities is interpreted as a manifestation of the order parameter quantum fluctuations. We propose a model taking into account the broadening of the density of states due to the interaction of electrons with the Mooij–Schön plasmon mode emerging in a quasi-one-dimensional superconducting channel in the regime of quantum fluctuations of the order parameter. The model gives results that are in a reasonable qualitative agreement with the experimental data.
Citation:
K. Yu. Arutyunov, J. S. Lehtinen, A. A. Radkevich, A. G. Semenov, A. D. Zaikin, “Density of states of narrow superconducting channels in the regime of quantum fluctuations of the order parameter”, Fizika Tverdogo Tela, 59:11 (2017), 2092–2094; Phys. Solid State, 59:11 (2017), 2110–2113
Linking options:
https://www.mathnet.ru/eng/ftt9382 https://www.mathnet.ru/eng/ftt/v59/i11/p2092
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