Interaction-driven Lifshitz transition with dipolar fermions in optical lattices

E. Van Loon, M. Katsnelson, L. Chomaz, M. Lemeshko, Physical Review B - Condensed Matter and Materials Physics 93 (2016).


Journal Article | Published | English
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Abstract
Anisotropic dipole-dipole interactions between ultracold dipolar fermions break the symmetry of the Fermi surface and thereby deform it. Here we demonstrate that such a Fermi surface deformation induces a topological phase transition - the so-called Lifshitz transition - in the regime accessible to present-day experiments. We describe the impact of the Lifshitz transition on observable quantities such as the Fermi surface topology, the density-density correlation function, and the excitation spectrum of the system. The Lifshitz transition in ultracold atoms can be controlled by tuning the dipole orientation and, in contrast to the transition studied in crystalline solids, is completely interaction driven.
Publishing Year
Date Published
2016-05-15
Journal Title
Physical Review B - Condensed Matter and Materials Physics
Volume
93
Issue
19
Article Number
195145
IST-REx-ID

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Van Loon E, Katsnelson M, Chomaz L, Lemeshko M. Interaction-driven Lifshitz transition with dipolar fermions in optical lattices. Physical Review B - Condensed Matter and Materials Physics. 2016;93(19). doi:10.1103/PhysRevB.93.195145
Van Loon, E., Katsnelson, M., Chomaz, L., & Lemeshko, M. (2016). Interaction-driven Lifshitz transition with dipolar fermions in optical lattices. Physical Review B - Condensed Matter and Materials Physics, 93(19). https://doi.org/10.1103/PhysRevB.93.195145
Van Loon, Erik, Mikhail Katsnelson, Lauriane Chomaz, and Mikhail Lemeshko. “Interaction-Driven Lifshitz Transition with Dipolar Fermions in Optical Lattices.” Physical Review B - Condensed Matter and Materials Physics 93, no. 19 (2016). https://doi.org/10.1103/PhysRevB.93.195145.
E. Van Loon, M. Katsnelson, L. Chomaz, and M. Lemeshko, “Interaction-driven Lifshitz transition with dipolar fermions in optical lattices,” Physical Review B - Condensed Matter and Materials Physics, vol. 93, no. 19, 2016.
Van Loon E, Katsnelson M, Chomaz L, Lemeshko M. 2016. Interaction-driven Lifshitz transition with dipolar fermions in optical lattices. Physical Review B - Condensed Matter and Materials Physics. 93(19).
Van Loon, Erik, et al. “Interaction-Driven Lifshitz Transition with Dipolar Fermions in Optical Lattices.” Physical Review B - Condensed Matter and Materials Physics, vol. 93, no. 19, 195145, American Physical Society, 2016, doi:10.1103/PhysRevB.93.195145.

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