Effective Mass Calculations for Two-dimensional Gas of Dipolar Fermions

• Published in: Journal of low temperature physics Vol. 187; no. 5-6; pp. 705 - 711
• Main Authors: Seydi, I., Abedinpour, S. H., Tanatar, B.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-06-2017; Springer Nature B.V
• Subjects: Characterization and Evaluation of Materials; Condensed Matter Physics; Dipole moments; Fermions; Low temperature physics; Magnetic Materials; Magnetism; Mathematical analysis; Physics; Physics and Astronomy; Structure factor; Effective mass; Dipole–dipole interaction; approximation
• ISSN: 0022-2291; 1573-7357
• DOI: 10.1007/s10909-016-1678-6

We consider a two-dimensional system of ultracold dipolar fermions with dipole moments aligned in the perpendicular direction. We use the static structure factor information from Fermi-Hypernetted-Chain calculations to obtain the effective many-body dipole–dipole interaction and calculate the many-body effective mass of the system within the
G
0
W
approximation to the self-energy. A large cancellation between different contributions to the self-energy results in a weak dependence of the effective mass on the interaction strength over a large range of coupling constants.