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• W2068821796 abstract "We study the unconventional behavior of massless Dirac fermions due to interaction with a U(1) gauge field in two spatial dimensions. At zero chemical potential, the longitudinal and transverse components of gauge interaction are both long-ranged. There is no fermion velocity renormalization since the system respects Lorentz invariance. At finite chemical potential, the Lorentz invariance is explicitly broken by the finite Fermi surface. The longitudinal gauge interaction is statically screened and becomes unimportant, whereas the transverse gauge interaction remains long-ranged and leads to singular renormalization of fermion velocity. The anomalous dimension of fermion velocity is calculated by means of the renormalization group method. We then examine the influence of singular velocity renormalization on several physical quantities, and show that they exhibit different behavior at zero and finite chemical potential." @default.
• W2068821796 created "2016-06-24" @default.
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• W2068821796 date "2012-05-10" @default.
• W2068821796 modified "2023-09-26" @default.
• W2068821796 title "Unconventional behavior of Dirac fermions in three-dimensional gauge theory" @default.
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• W2068821796 doi "https://doi.org/10.1103/physrevd.85.105010" @default.
• W2068821796 hasPublicationYear "2012" @default.
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