Nonlocal fluctuation effects in clean superconductor

A.A. Varlamov^a, D.V. Livanov^b, G. Savona^a
^aUniversità degli Studi di Roma — Tor Vergata, via di Tor Vergata, 110 Roma, I-00133, Italy , Roma , Italy
^bNational University of Science and Technology «MISIS», Leninskii av., 4 Moscow, 119049, Russia , Moscow , Russia

The theory of fluctuation conductivity for an arbitrary impurity concentration including ultra-clean limit ($T_\tau\gg\sqrt{T_c/T-T_c}$) is developed. It is demonstrated that the formal divergency of the fluctuation density of states contribution obtained previously for the clean case is removed by the correct treatment of the nonlocal ballistic electron scattering. We show that in the ultra-clean limit the density-of-states quantum corrections are canceled by the Maki–Thompson term and only classical paraconductivity remains.

PACS: 74.20.−z, 74.70.−b, 74.80.-g, 03.65.Ud (all)
DOI: 10.1070/1063-7869/44/10S/S21
URL: https://ufn.ru/en/articles/2001/13/u/
Citation: Varlamov A A, Livanov D V, Savona G "Nonlocal fluctuation effects in clean superconductor" Phys. Usp. 44 94–98 (2001)

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PT Journal Article
TI Nonlocal fluctuation effects in clean superconductor
AU Varlamov A A
FAU Varlamov AA
AU Livanov D V
FAU Livanov DV
AU Savona G
FAU Savona G
DP 10 Sup, 2001
TA Phys. Usp.
VI 44
IP 13
PG 94-98
RX 10.1070/1063-7869/44/10S/S21
URL https://ufn.ru/en/articles/2001/13/u/
SO Phys. Usp. 2001 Sup 10;44(13):94-98

Оригинал: Varlamov A A, Livanov D V, Savona G «Nonlocal fluctuation effects in clean superconductor» УФН 171 94–98 (2001); DOI: 10.1070/1063-7869/44/10S/S21