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• W2049278547 abstract "We devise a dimensional regularization scheme for quantum field theories with Fermi surface to study scaling behaviour of non-Fermi liquid states in a controlled approximation. Starting from a Fermi surface in two space dimensions, the co-dimension of Fermi surface is extended to a general value while the dimension of Fermi surface is fixed. When Fermi surface is coupled with a critical boson centered at zero momentum, the interaction becomes marginal at a critical space dimension d_c=5/2. A deviation from the critical dimension is used as a small parameter for a systematic expansion. We apply this method to the theory where two patches of Fermi surface is coupled with a critical boson, and show that the Ising-nematic critical point is described by a stable non-Fermi liquid state slightly below the critical dimension. Critical exponents are computed upto the two-loop order." @default.
• W2049278547 created "2016-06-24" @default.
• W2049278547 creator A5038572640 @default.
• W2049278547 creator A5058361373 @default.
• W2049278547 date "2013-12-04" @default.
• W2049278547 modified "2023-09-27" @default.
• W2049278547 title "Perturbative non-Fermi liquids from dimensional regularization" @default.
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• W2049278547 doi "https://doi.org/10.1103/physrevb.88.245106" @default.
• W2049278547 hasPublicationYear "2013" @default.
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