Abstract

We present a theoretical framework for a quantitative understanding of the full doping dependence of the optical spectra of the cuprates. In accord with experimental observations, the computed spectra show how the high-energy charge-transfer (CT) gap features persist in the overdoped regime even after the midinfrared (MIR) peak originating from the pseudogap has collapsed in a quantum critical point. In this way, we reconcile the opposing tendencies of the MIR and CT peaks to shift in opposite directions in the optical spectra with increasing doping. The competition between the pseudogap and the CT gap also results in rapid loss of spectral weight in the high energy region with doping.

Notes

Originally published in Physical Review B v.81 (2010): 174504. DOI: 10.1103/PhysRevB.81.174504

Keywords

optical model solution, doping dependence, high energy charge transfer gap, midinfrared peak, pseuodogap, CT gap, cuprates

Subject Categories

Superconductors

Disciplines

Physics

Publisher

American Physical Society

Publication Date

5-5-2010

Rights Information

Copyright 2010 American Physical Society.

Rights Holder

American Physical Society

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