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Spin-triplet pairing instability of the spinon fermi surface in a U(1) spin liquid

TitleSpin-triplet pairing instability of the spinon fermi surface in a U(1) spin liquid
Publication TypeJournal Article
Year of Publication2007
AuthorsV. M. Galitski, and Y B. Kim
JournalPhys. Rev. Lett.
Date Publisheddec
Keywords2007, Single Fellow

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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