Scientific Results

Liquid and Crystal Phases of Dipolar Fermions in Two Dimensions

Year: 2012

Authors: Matveeva N., Giorgini S.

Autors Affiliation: Dipartimento di Fisica, Universita’ di Trento and CNR-INO BEC Center, I-38050 Povo, Trento, Italy

Abstract: The liquid and crystal phases of a single-component Fermi gas with dipolar interactions are investigated using quantum Monte Carlo methods in two spatial dimensions and at zero temperature. The dipoles are oriented by an external field perpendicular to the plane of motion, resulting in a purely repulsive 1/r(3) interaction. In the liquid phase we calculate the equation of state as a function of the interaction strength and other relevant properties characterizing the Fermi-liquid behavior: effective mass, discontinuity at the Fermi surface, and pair correlation function. In the high density regime we calculate the equation of state of the Wigner crystal phase and the critical density of the liquid to solid quantum phase transition. Close to the freezing density we also search for the existence of a stripe phase, but such a phase is never found to be energetically favorable.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 109 (20)      Pages from: 200401-1  to: 200401-5

More Information: AMER PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
DOI: 10.1103/PhysRevLett.109.200401
KeyWords: POLAR-MOLECULES; STATE;
DOI: 10.1103/PhysRevLett.109.200401

Citations: 45
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