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

Simple item page
dc.creatorRueff, Jean-Pascal
dc.creatorCalandra, M.
dc.creatorD'astuto, M.
dc.creatorLeininger, Ph.
dc.creatorShukla, A.
dc.creatorBossak, A.
dc.creatorKrisch, M.
dc.creatorIshii, H.
dc.creatorCai, Y.
dc.creatorBadica, P.
dc.creatorSasaki, T.
dc.creatorYamada, K.
dc.creatorTogano, K.
dc.date2006-01-13
dc.date.accessioned2026-07-07T06:57:33Z
dc.date.available2026-07-07T06:57:33Z
dc.descriptionWe report on first investigation of the lattice dynamics in the novel superconducting material Na$\_{0.35}$CoO$\_2$$\cdot$1.3H$\_2$O and the non-hydrated parent compound Na$\_{0.7}$CoO$\_2$ by inelastic x-ray scattering. The measured phonon dispersion along the $Γ-M$ direction show a marked softening with hole doping of two optical phonon branches close to the Brillouin zone boundary. The phonon spectra, dispersion, and softening are well reproduced by first-principle calculations. The calculations indicates that the soft branches are mainly composed of Co-vibration modes. The estimation of the critical temperature based on electron-phonon coupling mechanism undisputedly points to a non-conventional superconducting state in this material.
dc.descriptionsubmitted to PRL
dc.identifierhttps://arxiv.org/abs/cond-mat/0601288
dc.identifierhttp://arxiv.org/abs/cond-mat/0601288
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/107006
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleEvidence for non-conventional pairing in Na$\_x$CoO$\_2$$\cdot$yH$\_2$O
dc.typetext

Files

Collections

arXiv