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- W2964112172 abstract "Condensed Matter Theory Center and Joint Quantum Institute, Department of Physics,University of Maryland, College Park, Maryland 20742-4111 USA(Dated: October 10, 2014)We study theoretically the properties of the interacting Dirac liquid, a novel three-dimensionalmany-body system which was recently experimentally realized and in which the electrons have achiral linear relativistic dispersion and a mutual Coulomb interaction. We nd that the intrinsicDirac liquid, where the Fermi energy lies exactly at the nodes of the band dispersion, displays unusualFermi liquid properties, whereas the extrinsic system with nite detuning or doping behaves asa standard Landau Fermi liquid. We present analytical and numerical results for the self-energyand spectral function based on both Hartree-Fock and the random phase approximation (RPA)theories and compute the quasiparticle lifetime, residue, and renormalized Fermi velocity of theextrinsic Dirac liquid. A full numerical calculation of the extrinsic RPA spectral function indicatesthat the Fermi liquid description breaks down for large-energy excitations. Furthermore, we nd anadditional plasmaron quasiparticle sideband in the spectral function which is discontinuous aroundthe Fermi energy. Our predictions should be observable in ARPES and STM measurements." @default.
- W2964112172 created "2019-07-30" @default.
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- W2964112172 date "2015-03-04" @default.
- W2964112172 modified "2023-09-26" @default.
- W2964112172 title "Interacting Dirac liquid in three-dimensional semimetals" @default.
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