Interacting hole-spin model for oxide superconductors
Susumu Kurihara
DOI 10.1103/PhysRevB.39.6600 · 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
It is shown that high-temperature superconductivity in cuprous oxide can be understood in terms of an interacting hole-spin model with superexchange and Kondo-type exchange interactions. Many important properties will be discussed, with special emphasis on the s-wave nature of Cooper pairs, reentrant behavior of Tc, finite isotope effect, and for YBa2Cu3O7−x, strong correlation between superconducting transition temperature and Cu(1)-O(4) bond length. The isotope effect has an origin quite different from the Bardeen-Cooper-Schrieffer theory, and the calculated value of its coefficient a is consistent with the experimental value ∼0.02. The main results of NMR studies, i.e. the s-wave nature of Cooper pairs as observed in O17 nuclei, and some puzzling aspects of the Cu NMR relaxation rates are discussed on the basis of the proposed model. A possible explanation to the anomaly in Cu NMR is given. It is predicted that oxygen ions should show a small displacement below the superconducting transition temperature Tc.
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. | — | Pressure not reported | unknown |
Similar papers
Effects of strong magnetic fields on pairing fluctuations in high-temperature superconductors
similarity 0.97M. Eschrig et al.
Source status unknown — claims are unverified
Magnetic Exchange Fields and Domain Wall Superconductivity at an All-Oxide Superconductor-Ferromagnet Insulator Interface
similarity 0.97S. Komori et al.
Source status unknown — claims are unverified
Long-range Coulomb interactions and the onset of superconductivity in the high-Tc materials
similarity 0.97S. Doniach & M. Inui
Source status unknown — claims are unverified
Intrinsic and structural isotope effects in iron-based superconductors
similarity 0.96R. Khasanov et al.
Source status unknown — claims are unverified
Topological phase fluctuations, amplitude fluctuations, and criticality in extreme type-II superconductors
similarity 0.96A. K. Nguyen & A. Sudbø
Source status unknown — claims are unverified
Microscopic theory of weak pseudogap behavior in the underdoped cuprate superconductors: General theory and quasiparticle properties
similarity 0.96Jörg Schmalian et al.
Source status unknown — claims are unverified