[Transition superfluide dans des gaz de fermions dipolaires désordonnés quasi bidimensionnels]
Nous étudions l’effet d’un désordre faible sur les propriétés superfluides des gaz de fermions dipolaires quasi bidimensionnels à deux composantes. L’amplitude de l’interaction dipôle-dipôle dépend de la quantité de mouvement, ce qui viole le théorème d’Anderson selon lequel un désordre faible n’a pratiquement aucun effet sur la température de transition superfluide dans le régime d’interaction faible. Nous trouvons que, pour les fermions dipolaires, la température de transition dans ce régime peut être fortement augmentée par le désordre comme dans le cas purement bidimensionnel. Cependant, l’effet se réduit si l’interaction entre les deux composantes fermioniques augmente, et dans le régime d’interaction forte, la température de transition superfluide en présence d’un désordre faible devient très proche de celle en l’absence de désordre.
We investigate the effect of weak disorder on the superfluid properties of two-component quasi-two-dimensional dipolar Fermi gases. The dipole-dipole interaction amplitude is momentum dependent, which violates the Anderson theorem claiming that the weak disorder has practically no influence on the superfluid transition temperature in the weakly interacting regime. We find that for dipolar fermions the transition temperature in this regime can be strongly increased by the disorder like in the purely two-dimensional case. However, the effect becomes smaller with increasing the intercomponent fermion-fermion interaction, and in the strongly interacting regime the superfluid transition temperature in the weak disorder becomes very close to that in the absence of disorder.
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Mot clés : Systèmes de fermions, effets du désordre, transition de phase superfluide, théorie BCS et ses développements, gaz ultrafroids
Victoria Y. Pinchenkova 1, 2 ; Sergey I. Matveenko 3, 1 ; Vladimir I. Yudson 4, 1 ; Georgy V. Shlyapnikov 1, 2, 5, 6
CC-BY 4.0
@article{CRPHYS_2023__24_S3_101_0,
author = {Victoria Y. Pinchenkova and Sergey I. Matveenko and Vladimir I. Yudson and Georgy V. Shlyapnikov},
title = {Superfluid transition in quasi-two-dimensional disordered dipolar {Fermi} gases},
journal = {Comptes Rendus. Physique},
pages = {101--111},
publisher = {Acad\'emie des sciences, Paris},
volume = {24},
number = {S3},
year = {2023},
doi = {10.5802/crphys.158},
language = {en},
}
TY - JOUR AU - Victoria Y. Pinchenkova AU - Sergey I. Matveenko AU - Vladimir I. Yudson AU - Georgy V. Shlyapnikov TI - Superfluid transition in quasi-two-dimensional disordered dipolar Fermi gases JO - Comptes Rendus. Physique PY - 2023 SP - 101 EP - 111 VL - 24 IS - S3 PB - Académie des sciences, Paris DO - 10.5802/crphys.158 LA - en ID - CRPHYS_2023__24_S3_101_0 ER -
%0 Journal Article %A Victoria Y. Pinchenkova %A Sergey I. Matveenko %A Vladimir I. Yudson %A Georgy V. Shlyapnikov %T Superfluid transition in quasi-two-dimensional disordered dipolar Fermi gases %J Comptes Rendus. Physique %D 2023 %P 101-111 %V 24 %N S3 %I Académie des sciences, Paris %R 10.5802/crphys.158 %G en %F CRPHYS_2023__24_S3_101_0
Victoria Y. Pinchenkova; Sergey I. Matveenko; Vladimir I. Yudson; Georgy V. Shlyapnikov. Superfluid transition in quasi-two-dimensional disordered dipolar Fermi gases. Comptes Rendus. Physique, Volume 24 (2023) no. S3, pp. 101-111. doi : 10.5802/crphys.158. https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.158/
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