Vortex-core states in superfluid Fermi-Fermi mixtures with unequal masses
We analyze the vortex-core states of two-species (mass imbalanced) superfluid fermion mixtures as a function of two-body binding energy. In particular, we solve the self-consistent Bogoliubov-de Gennes equations for a population balanced but mass imbalanced mixture of 6Li and 40K atoms at zero temperature. We find that the vortex core is mostly filled with the light-mass (6Li) fermions and that the core density of heavy-mass (40K) fermions is highly depleted. This is in contrast with the one-species (mass balanced) mixtures, where equal amount of density depletion is found at the vortex core for both pseudo-spin components.
Physical Review A (Atomic, Molecular and Optical Physics)
Vortex-core states, Superfluid Fermi-Fermi mixtures, 6Li and 40K mixture
Vortex-core states in superfluid Fermi-Fermi mixtures with unequal masses, Physical Review A (Atomic, Molecular and Optical Physics), [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=842457
(Accessed December 2, 2023)