UNIGE document Scientific Article
previous document  unige:24317  next document
add to browser collection
Title

Intraband optical spectral weight in the presence of a van Hove singularity: Application to Bi2Sr2CaCu2O8+δ

Authors
Published in Physical Review. B, Condensed Matter. 2006, vol. 74, no. 17, p. 174516
Abstract The Kubo single-band sum rule is used to determine the optical spectral weight of a tight-binding band with farther than nearest-neighbor hopping. We find for a wide range of parameters and doping concentrations that the change due to superconductivity at low temperature can be either negative or positive. In contrast, the kinetic energy change is always negative. We use an angle-resolved-photoemission-spectroscopy-determined tight-binding parametrization of Bi2Sr2CaCu2O8 δ to investigate whether this can account for recent observations of a positive change in the spectral weight due to the onset of superconductivity. With this band structure we find that in the relevant doping regime a straightforward BCS calculation of the optical spectral weight cannot account for the experimental observations.
Identifiers
Full text
Structures
Project FNS: NCCR MaNEP
Citation
(ISO format)
MARSIGLIO, Frank et al. Intraband optical spectral weight in the presence of a van Hove singularity: Application to Bi2Sr2CaCu2O8+δ. In: Physical Review. B, Condensed Matter, 2006, vol. 74, n° 17, p. 174516. https://archive-ouverte.unige.ch/unige:24317

213 hits

88 downloads

Update

Deposited on : 2012-12-04

Export document
Format :
Citation style :