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Sum rules and electrodynamics of high-Tc cuprates in the pseudogap state

D. N. Basov·E. J. Singley·S. V. Dordevic
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Abstract

We explore connections between the electronic density of states (DOS) in a conducting system and the frequency dependence of the scattering rate $1/τ(ω)$ inferred from infrared spectroscopy. We show that changes in the DOS upon the development of energy gaps can be reliably tracked through the examination of the $1/τ(ω)$ spectra using the sum rules discussed in the text. Applying this analysis to the charge dynamics in high-$T_c$ cuprates we found radically different trends in the evolution of the DOS in the pseudogap state and in the superconducting state.

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D. N. Basov, E. J. Singley, S. V. Dordevic. 2001-03-26. Sum rules and electrodynamics of high-Tc cuprates in the pseudogap state. https://doi.org/10.1103/physrevb.65.054516

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