Pairing in spin polarized two-species fermionic mixtures with mass asymmetry

Details Pairing in spin polarized two-species fermionic mixtures with mass asymmetry Pairing in spin polarized two-species fermionic mixtures with mass asymmetry

2008-05-13

arxiv.org/abs/0805.1784v2

Euro. Phys. J. D 49, 383-390 (2008).

Physics

Condensed Matter

Superconductivity

8 pages and 6 figures, few typos corrected, version to appear in EPJD

Scientific paper

10.1140/epjd/e2008-00169-0

We discuss on the pairing mechanism of fermions with mismatch in their fermi momenta due to a mass asymmetry. Using a variational ansatz for the ground state we also discuss the BCS -BEC crossover of this system. It is shown that the breached pairing solution with a single fermi surface is stable in the BEC regime. We also include the temperatures effect on the fermion pairing within an approximation that is valid for temperatures much below the critical temperature.

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