Mid-infrared reflectivity and ellipsometry measurements on single-crystal YBa sub 2 Cu sub 3 O sub 7 and Bi sub 2 Sr sub 2 CuO sub 6+ y

Journal Article · Sun Oct 01 04:00:00 EDT 1989 · Physical Review (Section) B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.40.6884· OSTI ID:5485933

Watanabe, Y ^[1]; Wang, Z Z ^[2]; Lyon, S A ^[3]; Tsui, D C ^[4]; Ong, N P ^[2]

---

1. Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544 (US)
2. Department of Physics, Princeton University, Princeton, New Jersey 08544
3. Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544
4. Department of Electrical Engineering and Department of Physics, Princeton University, Princeton, New Jersey 08544

We have measured the room-temperature reflectivity of 90-K'' single crystals YBa{sub 2}Cu{sub 3}O{sub 7} in the frequency range 600--9000 cm{sup {minus}1}. The reflectivity {ital R} in these highly conducting samples ({rho}{sub {ital ab}}=150 {mu}{Omega} cm at 290 K) is found to be higher than in previous reports. We fit {ital R} to a simple Drude-Lorentz model and compare the fit parameters with the dc transport values. (The effective-mass ratio of the carriers is found to be 2.0, and the scattering rate {h bar}/{tau} is 3.1{ital k}{sub {ital B}}T at room temperature.) Ellipsometry measurements have also been performed using transverse-electric and transverse-magnetic polarizations. The dielectric dispersion derived from ellipsometry shows some important deviations from the Drude-Lorentz model. Reflectivity data from nonsuperconducting crystals of Bi{sub 2}Sr{sub 2}CuO{sub 6+{ital y}} are also reported.

• OSTI ID: 5485933
• Journal Information: Physical Review (Section) B: Condensed Matter; (USA), Journal Name: Physical Review (Section) B: Condensed Matter; (USA) Vol. 40:10; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BISMUTH COMPOUNDS
BISMUTH OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTALS
DIELECTRIC PROPERTIES
DISPERSION RELATIONS
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELLIPSOMETRY
INFRARED RADIATION
MEASURING METHODS
MEDIUM TEMPERATURE
MONOCRYSTALS
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RADIATIONS
REFLECTIVITY
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SURFACE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES