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 a M. MANNEL

Základní údaje

Originální název

Stability of supercurrents and condensates in type I superconductors

Autoři

LIPAVSKY, P. (203 Česká republika), K. MORAWETZ (276 Německo), Břetislav ŠOPÍK (203 Česká republika, garant, domácí) a M. MANNEL (276 Německo)

Vydání

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

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10302 Condensed matter physics

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 1.345

Kód RIV

RIV/00216224:14740/14:00079370

Organizační jednotka

Středoevropský technologický institut

DOI

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

UT WoS

000329799200002

Klíčová slova anglicky

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

Štítky

kontrola MP, MP, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 27. 3. 2015 08:56, Martina Prášilová

Anotace

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.

Návaznosti

EE2.3.30.0009, projekt VaV

Název: Zaměstnáním čerstvých absolventů doktorského studia k vědecké excelenci

Citovat

LIPAVSKY, P., K. MORAWETZ, Břetislav ŠOPÍK a M. MANNEL. Stability of supercurrents and condensates in type I superconductors. EUROPEAN PHYSICAL JOURNAL B. NEW YORK: SPRINGER, 2014, roč. 87, č. 1, s. 1-10. ISSN 1434-6028. Dostupné z: 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 a M. MANNEL. Stability of supercurrents and condensates in type I superconductors. \textit{EUROPEAN PHYSICAL JOURNAL B}. NEW YORK: SPRINGER, 2014, roč.~87, č.~1, s.~1-10. ISSN~1434-6028. Dostupné z: https://dx.doi.org/10.1140/epjb/e2013-40932-2.

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