Infrared and microwave spectra of an energy gap in high-temperature superconductors
C. T. Rieck, W. A. Little, J. Ruvalds, A. Virosztek
DOI 10.1103/PhysRevB.51.3772 · Physical Review B
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
The optical reflectivity and microwave conductivity are calculated for a metal that becomes superconducting below a transition temperature Tc. Electron-electron scattering on a nested Fermi surface with an isotropic weak-coupling energy gap is found to yield a reflectance at low frequencies that is compatible with measurements on superconducting YBa2Cu3O7 crystals. The computed microwave surface resistance Rs drops dramatically near Tc in accord with cuprate experiments, although the data at very low temperatures remain above the isotropic gap prediction. Our nested Fermi-liquid analysis also gives a conductivity peak below Tc. The temperature variation of the measured Rs, the conductivity line-shape data, and the reflectivity spectra are all different from the corresponding results obtained with conventional phonon damping.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 91 | Pressure not reported | unknown |
Similar papers
Superconducting gap symmetries in YBa2Cu3O7−δ compatible with electronic Raman efficiencies and the local-density-approximation band structure
similarity 0.96Matthias Krantz
Source status unknown — claims are unverified
Electronic structure of high-Tc superconductors from core-level spectroscopies
similarity 0.96D. D. Sarma
Source status unknown — claims are unverified
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
Electronic structure of the high-temperature oxide superconductors
similarity 0.96Warren E. Pickett
Source status unknown — claims are unverified
Microwave absorption in the superconducting and normal phases of Y-Ba-Cu-O
similarity 0.95R. Durný et al.
Source status unknown — claims are unverified
Enhancement of superconductivity at structural defects in high-temperature superconductors
similarity 0.95A. Gurevich & E. A. Pashitskii
Source status unknown — claims are unverified