Evidence for non-conventional pairing in Na$\_x$CoO$\_2$$\cdot$yH$\_2$O

Jean-Pascal Rueff, M. Calandra, M. D'astuto +10

We report on first investigation of the lattice dynamics in the novel superconducting material Na$\_0.35$CoO$\_2$$\cdot$1.3H$\_2$O and the non-hydrated parent compound Na$\_{0.7}…