Normal-Superfluid Interface Scattering For Polarized Fermion Gases

Details Normal-Superfluid Interface Scattering For Polarized Fermion Gases Normal-Superfluid Interface Scattering For Polarized Fermion Gases

2006-09-11

arxiv.org/abs/cond-mat/0609240v2

Phys. Rev. Lett. 98, 170402 (2007)

Physics

Condensed Matter

Other Condensed Matter

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.98.170402

We argue that, for the recent experiments with imbalanced fermion gases, a temperature difference may occur between the normal (N) and the gapped superfluid (SF) phase. Using the mean-field formalism, we study particle scattering off the N-SF interface from the deep BCS to the unitary regime. We show that the thermal conductivity across the interface drops exponentially fast with increasing $h/k_B T$, where $h$ is the chemical potential imbalance. This implies a blocking of thermal equilibration between the N and the SF phase. We also provide a possible mechanism for the creation of gap oscillations (FFLO-like states) as seen in recent studies on these systems.

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