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Regular version of the site

Article

Smearing of electron density of states in quasi-one-dimensional superconducting channels due to quantum phase fluctuations

Journal of Magnetism and Magnetic Materials. 2018. Vol. 459. P. 356-358.
Arutyunov K., Lehtinen J. S., Radkevich A. A., Semenov A. G., Zaikin A. D.

Quasi-one-dimensional superconducting channels host sound-like plasma modes propagating along the
which are associated with fluctuations of the phase of the superconducting order parameter (Mooiji and
1985) [5]. Interaction between these electromagnetic excitations and charge carriers affects the electron density
of states (DOS). I-V characteristics of tunnel S1-I-S2 junctions, where superconducting S2 electrode
nanowire in the regime of quantum fluctuations have been studied. The observed broadening of the I-V dependencies
at the gap edge is interpreted as the renormalization of DOS. The results are in reasonable agreement
with the model, taking into consideration plasma modes in quasi-one-dimensional superconductors.