Scientific article
OA Policy
English

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

Published inNature communications, vol. 14, no. 1, 3033
Publication date2023-05-26
First online date2023-05-26
Abstract

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 ℏ ω / 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 $$\sim \ln T$$ ~ ln T 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.

Citation (ISO format)
MICHON, Bastien et al. Reconciling scaling of the optical conductivity of cuprate superconductors with Planckian resistivity and specific heat. In: Nature communications, 2023, vol. 14, n° 1, p. 3033. doi: 10.1038/s41467-023-38762-5
Main files (1)
Article (Published version)
accessLevelPublic
Identifiers
Additional URL for this publicationhttps://www.nature.com/articles/s41467-023-38762-5
Journal ISSN2041-1723
135views
90downloads

Technical informations

Creation26/05/2023 07:26:03
First validation07/06/2023 12:51:43
Update time12/06/2023 08:59:55
Status update12/06/2023 08:59:55
Last indexation01/11/2024 05:16:55
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack