scholarly journals On the determination of the quasiparticle scattering rate in unconventional superconductors by microwave surface impedance

2013 ◽  
Vol 39 (12) ◽  
pp. 1110-1112 ◽  
Author(s):  
N. T. Cherpak ◽  
A. A. Barannik ◽  
R. Prozorov ◽  
M. Tanatar ◽  
A. V. Velichko
Keyword(s):  
Surface Impedance ◽  
Microwave Surface Impedance ◽  
Unconventional Superconductors ◽  
Scattering Rate ◽  
Quasiparticle Scattering

Microwave surface impedance at 10 GHz and quasiparticle scattering in YBa2Cu3O7films

1993 ◽  
Vol 63 (16) ◽  
pp. 2274-2276 ◽  
Author(s):  
F. Gao ◽  
J. W. Kruse ◽  
C. E. Platt ◽  
M. Feng ◽  
M. V. Klein
Keyword(s):  
Surface Impedance ◽  
Microwave Surface Impedance ◽  
Quasiparticle Scattering

scholarly journals Rise and fall of Landau’s quasiparticles while approaching the Mott transition

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Andrej Pustogow ◽  
Yohei Saito ◽  
Anja Löhle ◽  
Miriam Sanz Alonso ◽  
Atsushi Kawamoto ◽  
...  
Keyword(s):  
Fermi Liquid ◽  
Mott Transition ◽  
Dynamical Localization ◽  
Strong Increase ◽  
Unconventional Superconductors ◽  
Scattering Rate ◽  
Complex Interactions ◽  
Liquid Behavior ◽  
Half Filling ◽  
Correlation Strength

AbstractLandau suggested that the low-temperature properties of metals can be understood in terms of long-lived quasiparticles with all complex interactions included in Fermi-liquid parameters, such as the effective mass m⋆. Despite its wide applicability, electronic transport in bad or strange metals and unconventional superconductors is controversially discussed towards a possible collapse of the quasiparticle concept. Here we explore the electrodynamic response of correlated metals at half filling for varying correlation strength upon approaching a Mott insulator. We reveal persistent Fermi-liquid behavior with pronounced quadratic dependences of the optical scattering rate on temperature and frequency, along with a puzzling elastic contribution to relaxation. The strong increase of the resistivity beyond the Ioffe–Regel–Mott limit is accompanied by a ‘displaced Drude peak’ in the optical conductivity. Our results, supported by a theoretical model for the optical response, demonstrate the emergence of a bad metal from resilient quasiparticles that are subject to dynamical localization and dissolve near the Mott transition.

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