Reconciling scaling of the optical conductivity of cuprate superconductors with Planckian resistivity and specific heat.

Autor: Michon B; Department of Quantum Matter Physics, University of Geneva, Geneva, Switzerland.; Department of Physics, City University of Hong Kong, Kowloon, Hong Kong, China.; Hong Kong Institute for Advanced Study, City University of Hong Kong, Kowloon, Hong Kong, China., Berthod C; Department of Quantum Matter Physics, University of Geneva, Geneva, Switzerland., Rischau CW; Department of Quantum Matter Physics, University of Geneva, Geneva, Switzerland., Ataei A; Institut Quantique, Département de Physique & RQMP, Université de Sherbrooke, Sherbrooke, Québec, Canada., Chen L; Institut Quantique, Département de Physique & RQMP, Université de Sherbrooke, Sherbrooke, Québec, Canada., Komiya S; Energy Transformation Research Laboratory, Central Research Institute of Electric Power Industry, Yokosuka, Kanagawa, Japan., Ono S; Energy Transformation Research Laboratory, Central Research Institute of Electric Power Industry, Yokosuka, Kanagawa, Japan., Taillefer L; Institut Quantique, Département de Physique & RQMP, Université de Sherbrooke, Sherbrooke, Québec, Canada.; Canadian Institute for Advanced Research, Toronto, ON, Canada., van der Marel D; Department of Quantum Matter Physics, University of Geneva, Geneva, Switzerland. dirk.vandermarel@unige.ch., Georges A; Department of Quantum Matter Physics, University of Geneva, Geneva, Switzerland. antoine.georges@college-de-france.fr.; Collège de France, Paris, France. antoine.georges@college-de-france.fr.; Center for Computational Quantum Physics, Flatiron Institute, New York, NY, USA. antoine.georges@college-de-france.fr.; CPHT, CNRS, École Polytechnique, IP Paris, Palaiseau, France. antoine.georges@college-de-france.fr.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2023 May 26; Vol. 14 (1), pp. 3033. Date of Electronic Publication: 2023 May 26.
DOI: 10.1038/s41467-023-38762-5
Abstrakt: Materials tuned to a quantum critical point display universal scaling properties as a function of temperature T and frequency ω. A long-standing puzzle regarding cuprate superconductors has been the observed power-law dependence of optical conductivity with an exponent smaller than one, in contrast to T-linear dependence of the resistivity and ω-linear dependence of the optical scattering rate. Here, we present and analyze resistivity and optical conductivity of La 2-x Sr x CuO 4 with x = 0.24. We demonstrate ℏω/k B T scaling of the optical data over a wide range of frequency and temperature, T-linear resistivity, and optical effective mass proportional to [Formula: see text] corroborating previous specific heat experiments. We show that a T, ω-linear scaling Ansatz for the inelastic scattering rate leads to a unified theoretical description of the experimental data, including the power-law of the optical conductivity. This theoretical framework provides new opportunities for describing the unique properties of quantum critical matter.
(© 2023. The Author(s).)
Databáze: MEDLINE
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