Infrared reflectivity of untwinned YBa[sub 2](Cu[sub 1[minus][ital x]]Zn[sub [ital x]])[sub 3]O[sub 7[minus][delta]] single crystals
- NTT Basic Research Laboratories, 3-1 Morinosato Wakamiya, Atsugi-shi, Kanagawa 243-01 (Japan)
The [ital ab]-plane reflectivity of untwinned YBa[sub 2](Cu[sub 1[minus][ital x]]Zn[sub [ital x]])[sub 3]O[sub 7[minus][delta]] single crystals is measured between 250 and 20 000 cm[sup [minus]1] at room temperature. Through Zn substitution, the optical conductivity along [bold E][parallel][ital b] shows a broad peak at about 2000 cm[sup [minus]1], suggesting localization of the chain band carrier. The conductivity along [bold E][parallel][ital a] shows no mid-infrared absorption and slightly decreases from the far- to mid-infrared region through Zn substitution. Analysis of the conductivity along [bold E][parallel][ital a] shows that the main effect of Zn substitution is to increase the impurity scattering rate. A small amount of carrier reduction and suppression of effective mass enhancement at low frequency are also observed. The suppression of the effective mass enhancement is discussed by the antiferromagnetic spin-fluctuation theory of Fermi liquid.
- OSTI ID:
- 6401159
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Vol. 51:14; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM OXIDES
REFLECTIVITY
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
YTTRIUM OXIDES
CARRIER DENSITY
EFFECTIVE MASS
ELECTRIC CONDUCTIVITY
FERMI GAS MODEL
INFRARED SPECTRA
MONOCRYSTALS
ZINC ADDITIONS
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTALS
ELECTRICAL PROPERTIES
MASS
MATHEMATICAL MODELS
NUCLEAR MODELS
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SPECTRA
SUPERCONDUCTORS
SURFACE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
ZINC ALLOYS
665411* - Basic Superconductivity Studies- (1992-)