Saddle-point pairing: An electronic mechanism for superconductivity
D. M. Newns, H. R. Krishnamurthy, P. C. Pattnaik, C. C. Tsuei, C. L. Kane
DOI 10.1103/PhysRevLett.69.1264 · 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
It is shown that the interactions in a strongly correlated quasi-two-dimensional electron gas with the Fermi level lying at a saddle point (Van Hove singularity) in ɛk can give rise to superconductivity by exchange of excitations with a characteristic low electronic energy scale E*. Application to cuprate superconductors shows that this mechanism along with a conventional electron-phonon interaction can explain the high Tc’s and the anomalous behavior of the isotope shift as a function of doping.
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. | 90 | Pressure not reported | unknown |
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
Electronic structure of the high-temperature oxide superconductors
similarity 0.96Warren E. Pickett
Source status unknown — claims are unverified
Electronic structure of high-Tc superconductors from core-level spectroscopies
similarity 0.95D. D. Sarma
Source status unknown — claims are unverified
Defects, lattice instabilities, and isotope effects in (Y,Pr)Ba-Cu-O high-temperature superconductors
similarity 0.95J. C. Phillips
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
Possibility of a common origin to ferroelectricity and superconductivity in oxides
similarity 0.95A. Bussmann-Holder et al.
Source status unknown — claims are unverified