Effects of strong Coulomb correlations on the phonon-mediated superconductivity: A model inspired by Copper oxides

Ju H. Kim; Zlatko Tešanović

doi:10.1103/PhysRevLett.71.4218

← Back to search

Effects of strong Coulomb correlations on the phonon-mediated superconductivity: A model inspired by Copper oxides

Ju H. Kim, Zlatko Tešanović

DOI 10.1103/PhysRevLett.71.4218 · Physical Review Letters

T1

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

We study how strong Coulomb correlations affect the phonon-mediated superconductivity. Using the Hubbard model representation of a strongly correlated system, we evaluate the Eliashberg electron-pair correlation function for different values of hole doping concentration, x. The pair interaction is repulsive near half filling (x=0), but it becomes attractive above some critical value of x, making the phonon-mediated superconductivity possible. We also compute the isotope effect coefficient.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Ba1-xKxBiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Nd2-xCexCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
La1.85Sr0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown