Density wave instability in a 2D dipolar Fermi gas

Details Density wave instability in a 2D dipolar Fermi gas Density wave instability in a 2D dipolar Fermi gas

2010-03-10

arxiv.org/abs/1003.2029v1

Physics

Condensed Matter

Quantum Gases

10 figures

Scientific paper

We consider a uniform dipolar Fermi gas in two-dimensions (2D) where the dipole moments of fermions are aligned by an orientable external field. We obtain the ground state of the gas in Hartree-Fock approximation and investigate RPA stability against density fluctuations of finite momentum. It is shown that the density wave instability takes place in a broad region where the system is stable against collapse. We also find that the critical temperature can be a significant fraction of Fermi temperature for a realistic system of polar molecules.

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