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

Marsiglio, Frank; Carbone, Fabrizio; Kuzmenko, Alexey; Van Der Marel, Dirk

doi:10.1103/PhysRevB.74.174516

Scientific article

English

Intraband optical spectral weight in the presence of a van Hove singularity: Application to Bi₂Sr₂CaCu₂O_8+δ

Contributors

Marsiglio, Frank; Carbone, Fabrizio; Kuzmenko, Alexey

; Van Der Marel, Dirk

Published in

Physical review. B, Condensed matter and materials physics, vol. 74, no. 17, 174516

Publication date

2006

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.

UNIGE affiliation entities

Faculté des sciences / Section de physique / Département de physique de la matière quantique

UNIGE research groups

Funding

Swiss National Science Foundation - NCCR MaNEP

Citation (ISO format)

MARSIGLIO, Frank et al. Intraband optical spectral weight in the presence of a van Hove singularity: Application to Bi₂Sr₂CaCu₂O_8+δ. In: Physical review. B, Condensed matter and materials physics, 2006, vol. 74, n° 17, p. 174516. doi: 10.1103/PhysRevB.74.174516

Article (Published version)

Identifiers

PID : unige:24317
DOI : 10.1103/PhysRevB.74.174516

Journal ISSN

1098-0121

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18/11/2012 09:41:00

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