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Vibrational modes in silicon clathrate compounds : a key to understanding superconductivity

hal.structure.identifierDepartment of Applied Chemistry [Faculty of Engineering, Hiroshima University]
dc.contributor.authorRENY, Edouard
hal.structure.identifierLaboratoire de Physique de la Matière Condensée et Nanostructures [LPMCN]
dc.contributor.authorSAN MIGUEL, Alfonso
hal.structure.identifierLaboratoire de Physico-Chimie des Matériaux Luminescents [LPCML]
dc.contributor.authorGUYOT, Yannick
hal.structure.identifierLaboratoire de Physique de la Matière Condensée et Nanostructures [LPMCN]
dc.contributor.authorMASENELLI, Bruno
hal.structure.identifierLaboratoire de Physique de la Matière Condensée et Nanostructures [LPMCN]
dc.contributor.authorMÉLINON, Patrice
hal.structure.identifierLaboratoire de Physico-Chimie des Matériaux Luminescents [LPCML]
dc.contributor.authorSAVIOT, L.
hal.structure.identifierDepartment of Applied Chemistry [Faculty of Engineering, Hiroshima University]
dc.contributor.authorYAMANAKA, S.
hal.structure.identifierLaboratoire de Physico-Chimie des Matériaux Luminescents [LPCML]
dc.contributor.authorCHAMPAGNON, Bernard
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCROS, Christian
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorPOUCHARD, Michel
hal.structure.identifierInstitut Laue-Langevin [ILL]
dc.contributor.authorBOROWSKI, M.
hal.structure.identifierEuropean Synchrotron Radiation Facility [ESRF]
dc.contributor.authorDIANOUX, A. J.
dc.date.issued2002
dc.identifier.issn1098-0121
dc.description.abstractEnSeveral doped type-I silicon clathrates (Na8@Si46, K8@Si46, Ba8@Si46 and I8@Si46) have been investigated both experimentally by inelastic neutron scattering and x-ray-absorption spectroscopy and theoretically by ab initio calculations. We find that Ba atoms have a stronger coupling with the host lattice than Na or K ones. We show that in the superconductor Ba8@Si46 the coupling is effectively done by host acoustic phonons exciting guest acoustic modes. These features suggest that the host-guest vibrational coupling is a crucial parameter to explain the appearance of superconductivity in addition to the density of states near the Fermi level.
dc.language.isoen
dc.publisherAmerican Physical Society
dc.subject.enSilicon
dc.subject.enClathrate
dc.subject.enSuperconductivity
dc.title.enVibrational modes in silicon clathrate compounds : a key to understanding superconductivity
dc.typeArticle de revue
dc.identifier.doi10.1103/PhysRevB.66.014532
dc.subject.halChimie/Matériaux
bordeaux.journalPhysical Review B: Condensed Matter and Materials Physics (1998-2015)
bordeaux.page014532 (7 p.)
bordeaux.volume66
bordeaux.issue1
bordeaux.peerReviewedoui
hal.identifierhal-00717021
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00717021v1
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