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Scattering Rate Gap in the IR Response of HgBa_2Ca_2Cu_3O_{8+delta}

J. J. McGuire·M. Windt·T. Startseva·T. Timusk·D. Colson·V. Viallet-Guillen
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Abstract

The ab-plane optical spectra of one underdoped and one nearly optimally doped single crystal of HgBa_2Ca_2Cu_3O_{8+delta} were investigated in the frequency range from 40 to 40,000 cm^-1. The frequency dependent scattering rate was obtained by Kramers Kronig analysis of the reflectance. Both crystals have a scattering rate gap of about 1000 cm^-1 which is much larger than the 700 cm^-1 gap seen in optical studies of several cuprates with maximum Tc around 93 K. There appears to be a universal scaling between scattering rate gap and maximum Tc for the cuprate superconductors.

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J. J. McGuire, M. Windt, T. Startseva, T. Timusk, D. Colson, V. Viallet-Guillen. 1999-12-17. Scattering Rate Gap in the IR Response of HgBa_2Ca_2Cu_3O_{8+delta}. https://doi.org/10.1103/physrevb.62.8711

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