Fulde-Ferrell-Larkin-Ovchinnikov state in bilayer dipolar systems

Hao Lee 1, 2, 3 S. I. Matveenko 3, 4 Daw-Wei Wang 1, 2 G. V. Shlyapnikov 3, 5, 6, 7, 8

Physical Review A, American Physical Society, 2017, 96 (6), 〈10.1103/PhysRevA.96.061602〉

We study the phase diagram of fermionic polar molecules in a bilayer system, with an imbalance of molecular densities of the layers. For the imbalance exceeding a critical value the system undergoes a transition from the uniform interlayer superfluid to the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state with a stripe structure, and at sufficiently large imbalance a transition from the FFLO to normal phase. Compared to the case of contact interactions, the FFLO regime is enhanced by the long-range character of the interlayer dipolar interaction, which can combine the s-wave and p-wave pairing in the order parameter.

  • 1. NTHU - National Tsing Hua University [Hsinchu]
  • 2. NCTS - National Center for Theoretical Sciences [Taiwan]
  • 3. LPTMS - Laboratoire de Physique Théorique et Modèles Statistiques
  • 4. L.D. Landau Institute for Theoretical Physics of RAS
  • 5. SPEC - UMR3680 - Service de physique de l'état condensé
  • 6. Russian Quantum Center
  • 7. VAN DER WAALS-ZEEMAN INSTITUTE - University of Amsterdam Van der Waals-Zeeman Institute
  • 8. Wuhan Institute of Physics and Mathematics