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초록
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.
키워드
- 제목
- Development of the optical conductivity with doping in single-domain YBa2Cu3O6+x
- 저자
- COOPER, SL; KOTZ, AL; KARLOW, MA; KLEIN, MV; LEE, WC; GIAPINTZAKIS, J; GINSBERG, DM
- 발행일
- 1992-02
- 권
- 45
- 호
- 5
- 페이지
- 2549 ~ 2552