Anomalous properties and micromorphology of
- 26 March 1990
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 64 (13), 1605-1608
- https://doi.org/10.1103/physrevlett.64.1605
Abstract
Anomalies in vibrational spectra measured by neutron and Raman scattering and spatial inhomogeneities in O exchange lead to a two-region micromorphological model of YBCO. This model explains why among ‘‘single-phase’’ high-temperature superconductors only YBCO exhibits a nearly zero isotope effect. This small isotope effect has been used as the justification for many exotic nonphonon models of high-temperature superconductivity, but the present discussion shows that such models are unnecessary.
Keywords
This publication has 30 references indexed in Scilit:
- Anisotropic superconducting properties of YBa_{2}Cu_{3}O_{7-δ} (δ=0.1 and 0.4) untwinned single crystalsPhysical Review Letters, 1989
- Phonon density-of-states for high-T c (Y, RE) Ba2Cu3O7 superconductors and non-superconducting reference systemsZeitschrift für Physik B Condensed Matter, 1988
- Effect of oxygen stoichiometry on softening of Raman active lattice modes inPhysical Review B, 1988
- Phonon self-energy effects due to superconductivity: Evidence for the strong-coupling limit in YBa2Cu3O7-δSolid State Communications, 1988
- Raman scattering from superconducting gap excitations in single-crystalPhysical Review B, 1988
- Phase diagram of the superconducting oxidePhysical Review B, 1988
- Isotope Effect in the High- Superconductors Y and EuPhysical Review Letters, 1987
- Superconductivity theories narrow downNature, 1987
- Search for Isotope Effect in Superconducting Y-Ba-Cu-OPhysical Review Letters, 1987
- Influence of the Superconducting Energy Gap on Phonon Linewidths inSnPhysical Review Letters, 1973