Anomalous metallic properties are often observed in the proximity of quantum critical points, with violation of the Fermi Liquid paradigm. We propose a scenario where, near the quantum critical point, dynamical fluctuations of the order parameter with finite correlation length mediate a nearly isotropic scattering among the quasiparticles over the entire Fermi surface. This scattering produces a strange metallic behavior, which is extended to the lowest temperatures by an increase of the damping of the fluctuations. We phenomenologically identify one single parameter ruling this increasing damping when the temperature decreases, accounting for both the linear-in-temperature resistivity and the seemingly divergent specific heat observed, e.g., in high-temperature superconducting cuprates and some heavy-fermion metals.
Dissipation-driven strange metal behavior / Caprara, Sergio; DI CASTRO, Carlo; Mirarchi, Giovanni; Seibold, GOTZ ULRICH; Grilli, Marco. - In: COMMUNICATIONS PHYSICS. - ISSN 2399-3650. - 5(2022). [10.1038/s42005-021-00786-y]
Dissipation-driven strange metal behavior
Sergio Caprara
Project Administration
;Carlo Di CastroSupervision
;Giovanni MirarchiMethodology
;Götz SeiboldWriting – Original Draft Preparation
;Marco Grilli
Project Administration
2022
Abstract
Anomalous metallic properties are often observed in the proximity of quantum critical points, with violation of the Fermi Liquid paradigm. We propose a scenario where, near the quantum critical point, dynamical fluctuations of the order parameter with finite correlation length mediate a nearly isotropic scattering among the quasiparticles over the entire Fermi surface. This scattering produces a strange metallic behavior, which is extended to the lowest temperatures by an increase of the damping of the fluctuations. We phenomenologically identify one single parameter ruling this increasing damping when the temperature decreases, accounting for both the linear-in-temperature resistivity and the seemingly divergent specific heat observed, e.g., in high-temperature superconducting cuprates and some heavy-fermion metals.File | Dimensione | Formato | |
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