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Superfluid Triplet Phases in Two-Dimensional Fermi-System with Repulsion

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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 Tc/εF) to the quartic terms in the free energy functional lift the degeneracy between these two phases in favour of the axial phase.

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Authors and Affiliations

  1. Institute of Radio Engineering and Electronics RAS, Moscow, 103907, Russia

    M. S. Mar'enko

  2. Max-Planck-Institut für Physik Komplexer Systeme, Dresden, 01187, Germany

    D. V. Efremov

  3. Moscow State Engineering Physics Institute, Moscow, 115409, Russia

    A. V. Ozharovskii

  4. Russian Research Center “Kurchatov Institute”, Moscow, 123182, Russia

    M. A. Baranov

  5. P.L. Kapitza Institute for Physical Problems, Moscow, 117334, Russia

    M. Yu. Kagan

Authors
  1. M. S. Mar'enko
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  2. D. V. Efremov
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  3. A. V. Ozharovskii
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  4. M. A. Baranov
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  5. M. Yu. Kagan
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Mar'enko, M.S., Efremov, D.V., Ozharovskii, A.V. et al. Superfluid Triplet Phases in Two-Dimensional Fermi-System with Repulsion. Journal of Low Temperature Physics 126, 551–556 (2002). https://doi.org/10.1023/A:1013715101064

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  • DOI: https://doi.org/10.1023/A:1013715101064

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