Superfluid Density of Strongly Underdoped Cuprate Superconductors from a Four-Dimensional XY Model
M. Franz, A. P. Iyengar
DOI 10.1103/PhysRevLett.96.047007 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
A new phenomenology is proposed for the superfluid density ρs of strongly underdoped cuprate superconductors based on recent data for ultraclean single crystals of YBa2Cu3O7−x. We show that the puzzling departure from Uemura scaling and the decline of the slope as the Tc=0 quantum critical point is approached can be understood in terms of the renormalization of quasiparticle effective charge by quantum fluctuations of the superconducting phase. We then employ a (3+1)-dimensional XY model to calculate, within particular approximations, the renormalization of ρs and its slope, explain the new phenomenology, and predict its eventual demise close to the quantum critical point.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93 | Pressure not reported | onset |
Similar papers
Implications of crystal-field and intra-atomic interactions for the electronic structure of high-Tc superconductors
similarity 0.96Frank J. Adrian
Source status unknown — claims are unverified
Superconducting gap symmetries in YBa2Cu3O7−δ compatible with electronic Raman efficiencies and the local-density-approximation band structure
similarity 0.95Matthias Krantz
Source status unknown — claims are unverified
Quasiparticle lifetimes in a dx2−y2 superconductor
similarity 0.95Daniel Duffy et al.
Source status unknown — claims are unverified
Superconducting-state thermal transport in YBa2Cu3O7−δ
similarity 0.95J. L. Cohn et al.
Source status unknown — claims are unverified
Relationship between superconductivity and crystalline stability of the Y-Ba-Cu-O system
similarity 0.95H. Zhang et al.
Source status unknown — claims are unverified
Critical fluctuations and lowest-Landau-level scaling of the specific heat of high-temperature superconductors
similarity 0.95Stephen W. Pierson et al.
Source status unknown — claims are unverified