Abstract
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.
Publisher
Springer Science and Business Media LLC
Subject
General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry
Reference54 articles.
1. Landau, L. D. The theory of a Fermi liquid. Zh. Eksp. Teor. Fiz. 30, 1058 (1956).
2. Gurzhi, R. Mutual electron correlations in metal optics. J. Exp. Theor. Phys. 8, 673 (1959).
3. Maslov, D. L. & Chubukov, A. V. First-Matsubara-frequency rule in a Fermi liquid. II. Optical conductivity and comparison to experiment. Phys. Rev. B 86, 155137 (2012).
4. Berthod, C. et al. Non-Drude universal scaling laws for the optical response of local Fermi liquids. Phys. Rev. B 87, 115109 (2013).
5. Maslov, D. L. & Chubukov, A. V. Optical response of correlated electron systems. Rep. Prog. Phys. 80, 026503 (2017).
Cited by
25 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献