Thermal conductivity across the phase diagram of cuprates: Low-energy quasiparticles and doping dependence of the superconducting gap
By M. Sutherland, D. Hawthorn, R. W. Hill, F. Ronning, S. Wakimoto, H. Zhang, C. Proust, E. Boaknin, C. Lupien, L. Taillefer and 8 more. 2003
171 citations recorded by the source corpus.
Heat transport in the cuprate superconductors ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{y}$ and ${\mathrm{La}}_{2\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{CuO}}_{4}$ was measured at low temperatures as a function of doping. A residual linear term ${\ensuremath{\kappa}}_{0}/T$ is observed throughout the superconducting region and it decreases steadily as the Mott insulator is approached from the overdoped regime. The low-energy quasiparticle gap extracted from ${\ensuremath{\kappa}}_{0}/T$ is seen to scale closely with the pseudogap. The ubiquitous presence of nodes and the tracking of the pseudogap shows that the overall gap remains of the pure d-wave form throughout the phase diagram, which excludes the possibility of a complex component $(\mathrm{ix})$ appearing at a putative quantum phase transition and argues against a nonsuperconducting origin to the pseudogap. A comparison with superfluid density measurements reveals that the quasiparticle effective charge is weakly dependent on doping and close to unity.
Subfields: Condensed Matter Physics
View Paper: https://www.semanticscholar.org/paper/285a131940cc39e6ad0d27c9729fcdc77605b7eb
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In Condensed Matter Physics
Citations in the corpus
- Doping a Mott insulator: Physics of high-temperature superconductivity (2004, unknown): “13 (Sutherland et al., 2003).”
- Two energy scales and two distinct quasiparticle dynamics in the superconducting state of underdoped cuprates (2006, result): “In order to point out the universality of this phenomena, we have applied the same Raman sum-rule to a number of spectra previously published in the literature for Y-123 and Bi-2212 [4, 5, 6, 9].”