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arXiv · 1003.2029

Density wave instability in a 2D dipolar Fermi gas

Yasuhiro Yamaguchi·Takaaki Sogo·Toru Ito·Takahiko Miyakawa
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Abstract

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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Yasuhiro Yamaguchi, Takaaki Sogo, Toru Ito, Takahiko Miyakawa. 2010-03-10. Density wave instability in a 2D dipolar Fermi gas. https://doi.org/10.1103/physreva.82.013643

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