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- W3046908169 abstract "Multiple-band nature of electronic energy bands leads to novel physical effects in solids. In this paper, we clarify physical properties of a Fermi system with a pair of electron and hole Fermi surfaces (FSs), whose coupling is mediated by a critical U(1) boson field. By using a one-loop renormalization group analysis, we show that when the boson field undergoes a quantum phase transition with broken U(1) symmetry, the multiple-band Fermi system shows a non-Fermi liquid (non-FL) behavior in its thermodynamic and magnetic properties. At a quantum critical point (QCP), Fermi velocities of the two FSs are renormalized into the same critical velocity as a boson velocity, and the fermion's density of states (DOS) shows a pseudogap behavior with a logarithmic energy dependence at the QCP." @default.
- W3046908169 created "2020-08-07" @default.
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- W3046908169 date "2020-12-28" @default.
- W3046908169 modified "2023-10-11" @default.
- W3046908169 title "Fate of a multiple-band Fermi liquid that is coupled with critical ϕ4 bosons" @default.
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- W3046908169 doi "https://doi.org/10.1103/physrevb.102.235158" @default.
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