Development of the optical conductivity with doping in single-domain YBa2Cu3O6+x

S. L. Cooper, A. L. Kotz, M. A. Karlow, M. V. Klein, W. C. Lee, J. Giapintzakis, D. M. Ginsberg

Research output: Contribution to journalArticlepeer-review


Optical studies of single-domain crystals of YBa2Cu3O6+x allow us to separate the CuO2-plane and CuO-chain contributions to the optical conductivity as a function of doping between 0.025 and 5.5 eV. We find several interesting consequences of doping on the optical conductivity of YBa2Cu3O6+x: the 4.1-eV transition in tetragonal YBa2Cu3O6.1 is split into a- and b-axis-polarized components by CuO-chain formation; oscillator strength associated with the charge-transfer band of insulating YBa2Cu3O6.1 is redistributed to low frequencies; and the low-frequency conductivity in the CuO2 planes evolves into a non-Drude response comprised of a single resolvable component. The CuO-chain conductivity, by contrast, is dominated by a midinfrared absorption band.

Original languageEnglish (US)
Pages (from-to)2549-2552
Number of pages4
JournalPhysical Review B
Issue number5
StatePublished - 1992

ASJC Scopus subject areas

  • Condensed Matter Physics


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