Does the orbital degeneracy play any role in the high thermopower of lamellar cobaltites?
FAGNARD, Jean-François
Department of Electrical Engineering and Computer Science [Institut Montefiore]
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Department of Electrical Engineering and Computer Science [Institut Montefiore]
Langue
en
Article de revue
Ce document a été publié dans
Journal of Applied Physics. 2007, vol. 101, n° 8, p. 083708
American Institute of Physics
Résumé en anglais
This article investigates the role of the CoO6 octahedron distortion on the electronic properties and more particularly on the high value of the Seebeck coefficient in the BiCaCoO lamellar cobaltites. Our measurements ...Lire la suite >
This article investigates the role of the CoO6 octahedron distortion on the electronic properties and more particularly on the high value of the Seebeck coefficient in the BiCaCoO lamellar cobaltites. Our measurements provide clues indicating that the t2g orbital degeneracy lifting has to be considered to account for the observed high temperature limit of the thermopower...< Réduire
Mots clés en anglais
Thermoelectricity
Cobaltites
Electronic properties
Crystal field
Electronic correlations
Origine
Importé de halUnités de recherche