Inelastic light scattering from electronic and phononic excitations in normal and superconducting Tl[sub 2]Ba[sub 2]CuO[sub 6] single crystals

Journal Article · Mon Feb 01 04:00:00 EST 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.47.3450· OSTI ID:5528901

Nemetschek, R; Misochko, O V; Stadlober, B; Hackl, R ^[1]

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1. Walther-Meissner-Institut fuer Tieftemperaturforschung, 8046 Garching (Germany)

We report results of Raman-scattering experiments on electronic and phononic excitations in single-crystalline Tl[sub 2]Ba[sub 2]CuO[sub 6] with one Cu-O layer and a [ital T][sub [ital c]] of 80 K. The electronic scattering is similar to that in other Cu-O compounds, revealing a symmetry-dependent carrier relaxation rate above [ital T][sub [ital c]] and a characteristic redistribution of scattering intensity below [ital T][sub [ital c]]. The maximum pairing energy 2[Delta][sub 0] estimated from the spectra is between 8 and 9[ital kT][sub [ital c]]. In addition to the Raman-allowed phonons several new lines and bands are found which we believe to originate from the reduced symmetry of the Tl-O layers. The intensities of all phonon lines depend sensitively on the excitation wavelength.

• OSTI ID: 5528901
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 47:6; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
360207 -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
COPPER COMPOUNDS
CRYSTALS
CUPRATES
HIGH-TC SUPERCONDUCTORS
INELASTIC SCATTERING
LIGHT SCATTERING
MONOCRYSTALS
OXYGEN COMPOUNDS
PHONONS
QUASI PARTICLES
RAMAN EFFECT
SCATTERING
SUPERCONDUCTORS
THALLIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS