Superfluid triplet phases in two-dimensional Fermi-system with repulsion

Mar'enko, M. S.; Efremov, D. V.; Ozharovskii, A. V.; Baranov, M. A.; Kagan, M. Y.

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Superfluid triplet phases in two-dimensional Fermi-system with repulsion

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Efremov, D. V.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Kagan, M. Y.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Mar'enko, M. S., Efremov, D. V., Ozharovskii, A. V., Baranov, M. A., & Kagan, M. Y. (2002). Superfluid triplet phases in two-dimensional Fermi-system with repulsion. Journal of Low Temperature Physics, 126(1-2), 551-556. Retrieved from http://ipsapp008.lwwonline.com/ips/frames/menu.asp?J=4909&S=38648&M=44960#.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002B-3858-1

Abstract

We discuss the superfluid triplet-pairing phase diagram for a two-dimensional Fermi system with repulsive interaction. We find all the extrema of the phenomenological 2D triplet Ginzburg-Landau free energy functional. It turns out that they can be associated with 9 known 2D superfluid triplet phases. We find the stability conditions for all 2D phases. In the weak- coupling limit the absolute minimum of the free energy corresponds to both planar and axial phases. We show that the strong-coupling corrections (next order in T-c/epsilon(F)) to the quartic terms in the free energy functional lift the degeneracy between these two phases in favour of the axial phase.