Electron-spin-resonance studies of the Ag-, Eu-, and Gd-doped Y-Ba-Cu-O high-Tc superconductors
Juh Tzeng Lue
DOI 10.1103/PhysRevB.38.4592 · 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 electron-spin resonance (ESR) of pure and Ag-, Eu-, and Gd-doped YBa2Cu3O7−δ are measured at temperatures above and below the transition temperature Tc. The ESR signals are speculated to be due to electrons in the & levels of the Cu2+ ions hybridized with the oxygen 2p electrons in the tetragonal CuO42+ structure above the quasi Fermi level which lies at the middle of the Mott-Hubbard gap. For the pure orthorhombic structure or properly doped impure structures, the ESR signals disappear even at T>Tc, implying a net spin S=0 due to the super exchange force of the Cu2+ ions through the intermediate oxygen atoms.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | unknown |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93 | Pressure not reported | unknown |
| GdBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 91.4 | Pressure not reported | unknown |
| EuBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 94.5 | Pressure not reported | unknown |
Similar papers
Implications of crystal-field and intra-atomic interactions for the electronic structure of high-Tc superconductors
similarity 0.97Frank J. Adrian
Source status unknown — claims are unverified
Influence of electron-phonon interaction on spin-fluctuation-induced superconductivity
similarity 0.97T. S. Nunner et al.
Source status unknown — claims are unverified
O17 nuclear-magnetic-resonance spectroscopic study of high-Tc superconductors
similarity 0.96Eric Oldfield et al.
Source status unknown — claims are unverified
Resonant photoemission study of superconducting Y-Ba-Cu-O
similarity 0.96Richard L. Kurtz et al.
Source status unknown — claims are unverified
Measurement of the oxygen content in high-Tc superconductors: Enhanced resonant ion-scattering analysis
similarity 0.96J. C. Barbour et al.
Source status unknown — claims are unverified
Possible phononic mechanism for dx2−y2 superconductivity in the presence of short-range antiferromagnetic correlations
similarity 0.96Alexander Nazarenko & Elbio Dagotto
Source status unknown — claims are unverified