Volume 62, Number 4, May 2003
|Page(s)||568 - 574|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 May 2003|
Pairing in cuprates from high-energy electronic states
Laboratoire de Physique du Solide, CNRS UPR
5 Ecole Supérieure de Physique et Chimie Industrielles de la
Ville de Paris 75231 Paris cedex 5, France
2 Laboratoire de Physique des Solides, CNRS UMR 8502, Université Paris-Sud 91405 Orsay cedex, France
Corresponding author: Nicole.Bontemps@espci.fr
Accepted: 19 March 2003
The in-plane optical conductivity of films with small carrier density (underdoped) up to large carrier density (overdoped) is derived from accurate reflectivity data. Integrating the conductivity up to increasingly higher frequencies yields the energy scale involved in the formation of the condensate. At least in the underdoped sample, states extending up to 2 contribute to the superfluid. This anomalously large energy scale may be assigned to a change of in-plane kinetic energy at the superconducting transition, and is compatible with an electronic pairing mechanism.
PACS: 74.25.-q – Properties of type I and type II superconductors / 74.25.Gz – Optical properties / 74.72.Hs – -based cuprates
© EDP Sciences, 2003
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.