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- W2083234906 endingPage "17932" @default.
- W2083234906 startingPage "17917" @default.
- W2083234906 abstract "We study a model of fermions interacting with a gauge field and calculate gauge-invariant two-particle Green's functions or response functions. The leading singular contributions from the self-energy correction are found to be cancelled by those from the vertex correction for small $q$ and $Omega$. As a result, the remaining contributions are not singular enough to change the leading order results of the random phase approximation. It is also shown that the gauge field propagator is not renormalized up to two-loop order. We examine the resulting gauge-invariant two-particle Green's functions for small $q$ and $Omega$, but for all ratios of $Omega / v_F q$ and we conclude that they can be described by Fermi liquid forms without a diverging effective mass." @default.
- W2083234906 created "2016-06-24" @default.
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- W2083234906 date "1994-12-15" @default.
- W2083234906 modified "2023-09-27" @default.
- W2083234906 title "Gauge-invariant response functions of fermions coupled to a gauge field" @default.
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- W2083234906 doi "https://doi.org/10.1103/physrevb.50.17917" @default.
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