Stability of supercurrents and condensates in type I
superconductors

J 2014

Stability of supercurrents and condensates in type I superconductors

LIPAVSKY, P., K. MORAWETZ, Břetislav ŠOPÍK and M. MANNEL

Basic information

Original name

Stability of supercurrents and condensates in type I superconductors

Authors

LIPAVSKY, P. (203 Czech Republic), K. MORAWETZ (276 Germany), Břetislav ŠOPÍK (203 Czech Republic, guarantor, belonging to the institution) and M. MANNEL (276 Germany)

Edition

EUROPEAN PHYSICAL JOURNAL B, NEW YORK, SPRINGER, 2014, 1434-6028

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10302 Condensed matter physics

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

Impact factor

Impact factor: 1.345

RIV identification code

RIV/00216224:14740/14:00079370

Organization unit

Central European Institute of Technology

DOI

http://dx.doi.org/10.1140/epjb/e2013-40932-2

UT WoS

000329799200002

Keywords in English

2-DIMENSIONAL HUBBARD-MODEL; BOSE-EINSTEIN CONDENSATION; BCS SUPERCONDUCTIVITY; COOPER PAIRS; CROSSOVER; SYSTEMS; WEAK

Abstract

V originále

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 of pair breaking. This agrees with the experimentally well established fact that supercurrents in type I superconductors are limited by pair breaking, not by pair excitation.

Links

EE2.3.30.0009, research and development project

Name: Zaměstnáním čerstvých absolventů doktorského studia k vědecké excelenci

Citovat

LIPAVSKY, P., K. MORAWETZ, Břetislav ŠOPÍK and M. MANNEL. Stability of supercurrents and condensates in type I superconductors. EUROPEAN PHYSICAL JOURNAL B. NEW YORK: SPRINGER, 2014, vol. 87, No 1, p. 1-10. ISSN 1434-6028. Available from: https://dx.doi.org/10.1140/epjb/e2013-40932-2.

@article{1229082,
   author = {Lipavsky, P. and Morawetz, K. and Šopík, Břetislav and Mannel, M.},
   article_location = {NEW YORK},
   article_number = {1},
   doi = {http://dx.doi.org/10.1140/epjb/e2013-40932-2},
   keywords = {2-DIMENSIONAL HUBBARD-MODEL; BOSE-EINSTEIN CONDENSATION; BCS SUPERCONDUCTIVITY; COOPER PAIRS; CROSSOVER; SYSTEMS; WEAK},
   language = {eng},
   issn = {1434-6028},
   journal = {EUROPEAN PHYSICAL JOURNAL B},
   title = {Stability of supercurrents and condensates in type I superconductors},
   url = {http://link.springer.com/article/10.1140%2Fepjb%2Fe2013-40932-2#page-1},
   volume = {87},
   year = {2014}
}

TY  - JOUR
ID  - 1229082
AU  - Lipavsky, P. - Morawetz, K. - Šopík, Břetislav - Mannel, M.
PY  - 2014
TI  - Stability of supercurrents and condensates in type I superconductors
JF  - EUROPEAN PHYSICAL JOURNAL B
VL  - 87
IS  - 1
SP  - 1-10
EP  - 1-10
PB  - SPRINGER
SN  - 14346028
KW  - 2-DIMENSIONAL HUBBARD-MODEL
KW  - BOSE-EINSTEIN CONDENSATION
KW  - BCS SUPERCONDUCTIVITY
KW  - COOPER PAIRS
KW  - CROSSOVER
KW  - SYSTEMS
KW  - WEAK
UR  - http://link.springer.com/article/10.1140%2Fepjb%2Fe2013-40932-2#page-1
L2  - http://link.springer.com/article/10.1140%2Fepjb%2Fe2013-40932-2#page-1
N2  - 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 of pair breaking. This agrees with the experimentally well established fact that supercurrents in type I superconductors are limited by pair breaking, not by pair excitation.
ER  -

LIPAVSKY, P., K. MORAWETZ, Břetislav ŠOPÍK and M. MANNEL. Stability of supercurrents and condensates in type I superconductors. \textit{EUROPEAN PHYSICAL JOURNAL B}. NEW YORK: SPRINGER, 2014, vol.~87, No~1, p.~1-10. ISSN~1434-6028. Available from: https://dx.doi.org/10.1140/epjb/e2013-40932-2.

Detailed Information on Publication Record