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  • Title: Spin-triplet pairing instability of the spinon fermi surface in a U(1) spin liquid.
    Author: Galitski V, Kim YB.
    Journal: Phys Rev Lett; 2007 Dec 31; 99(26):266403. PubMed ID: 18233593.
    Abstract:
    Recent experiments on the organic compound kappa-(ET)2Cu2(CN)3 have provided a promising example of a two-dimensional spin liquid state. This phase is described by a two-dimensional spinon Fermi sea coupled to a U(1) gauge field. We study Kohn-Luttinger-like pairing instabilities of the spinon Fermi surface due to singular interaction processes with twice-the-Fermi-momentum transfer. We find that under certain circumstances the pairing instability occurs in odd-orbital-angular momentum or spin-triplet channels. Implications to experiments are discussed.
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