INVESTIGADORES
BEJAS Matias Hector
artículos
Título:
Cooperative effect of phonons and electronic correlations for superconductivity in cobaltates
Autor/es:
A. FOUSSATS; A. GRECO; M. BEJAS; A. MURAMATSU
Revista:
PHYSICAL REVIEW B - CONDENSED MATTER AND MATERIALS PHYSICS
Editorial:
American Physical Society
Referencias:
Año: 2005 vol. 72 p. 20504 - 20504
ISSN:
0163-1829
Resumen:
We propose that unconventional superconductivity in hydrated sodium cobaltate NaxCoO2 results from an interplay of electronic correlations and electron-phonon interactions. On the basis of the t − V model plusphonons we found evidence for a unconventional superconductivity, b realistic values of Tc, and c the dome shape existing near x sim 0.35. This picture is obtained for V close to the critical Coulomb repulsion Vc,which separates the uniform Fermi liquid from sqrt{3} x sqrt{3} charge-density-wave-ordered phase.
