Comptes Rendus
no. S3
Superfluid transition in quasi-two-dimensional disordered dipolar Fermi gases
[Transition superfluide dans des gaz de fermions dipolaires désordonnés quasi bidimensionnels]
Victoria Y. Pinchenkova1, 2  ; Sergey I. Matveenko3, 1 ; Vladimir I. Yudson4, 1 ; Georgy V. Shlyapnikov1, 2, 5, 6
1 Russian Quantum Center, Skolkovo, Moscow 143025, Russia
2 Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region, 141701, Russia
3 L. D. Landau Institute for Theoretical Physics, Chernogolovka, Moscow region 142432, Russia
4 Laboratory for Condensed Matter Physics, HSE University, Moscow 101000, Russia
5 Université Paris-Saclay, CNRS, LPTMS, 91405 Orsay, France
6 Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
Comptes Rendus. Physique, Online first (2023), pp. 1-11.

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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DOI : 10.5802/crphys.158
Keywords: Fermion systems, Effects of disorder, Superfluid phase transition, BCS theory and its development, Ultracold gases
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

1 Russian Quantum Center, Skolkovo, Moscow 143025, Russia
2 Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region, 141701, Russia
3 L. D. Landau Institute for Theoretical Physics, Chernogolovka, Moscow region 142432, Russia
4 Laboratory for Condensed Matter Physics, HSE University, Moscow 101000, Russia
5 Université Paris-Saclay, CNRS, LPTMS, 91405 Orsay, France
6 Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
Licence : CC-BY 4.0
Droits d'auteur : Les auteurs conservent leurs droits 
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     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},
     publisher = {Acad\'emie des sciences, Paris},
     year = {2023},
     doi = {10.5802/crphys.158},
     language = {en},
     note = {Online first},
}
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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, Online first (2023), pp. 1-11. doi : 10.5802/crphys.158.

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