Stability of supercurrents and condensates in type I superconductors

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F14%3A10283907" target="_blank" >RIV/00216208:11320/14:10283907 - isvavai.cz</a>

Alternative codes found

RIV/00216224:14740/14:00079370

Result on the web

<a href="http://dx.doi.org/10.1140/epjb/e2013-40932-2" target="_blank" >http://dx.doi.org/10.1140/epjb/e2013-40932-2</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjb/e2013-40932-2" target="_blank" >10.1140/epjb/e2013-40932-2</a>

Result language

angličtina

Original language name

Stability of supercurrents and condensates in type I superconductors

Original language description

Excitations of Cooper pairs into non-condensed bound pairs are similar to excitations of true bosons out of the Bose-Einstein condensate. Using the Landau criterion of superfluidity we evaluate the critical current above which these pair-excitations would lead to a finite resistivity. The predicted value strongly depends on the chosen approximation. The Thouless approach based on the Galitskii T-matrix and the Kadanoff-Martin theory which is in many aspects equivalent to the BCS theory, both lead to zero critical velocity, what is in conflict with the mere existence of supercurrents. In contrast, the T-matrix with multiple scattering corrections provides the critical velocity of pair excitation which is root 3-times larger than the critical velocity ofpair breaking. This agrees with the experimentally well established fact that supercurrents in type I superconductors are limited by pair breaking, not by pair excitation.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BM - Solid-state physics and magnetism

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2014

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

European Physical Journal B

ISSN

1434-6028

e-ISSN

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Volume of the periodical

87

Issue of the periodical within the volume

1

Country of publishing house

DE - GERMANY

Number of pages

10

Pages from-to

1-10

UT code for WoS article

000329799200002

EID of the result in the Scopus database

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