High-resolution photoemission study of the high-temperature superconductors

Thesis/Dissertation · Wed Jan 01 04:00:00 EST 1992

OSTI ID:7160620

Hwu, Yeukuang

High-resolution angle-resolved photoemission spectroscopy was used to study the 2212 BiCaSrCuO high temperature superconductors. A pronounced minimum that separates the two basic features of the spectrum, the narrow quasi-particle excitation peak and the still controversial broad band at lower kinetic energies was found. The minimum is approximately 3[Delta] below the Fermi energy. High-resolution angle-resolved photoemission was also used to test the relevance of the [open quotes]anomalous[close quotes] broadening near the Fermi edge of 2212 BiCaSrCuO, by comparing it to the spectra of other Fermi liquids such as Ag and NBSe[sub 2]. None of the results was found in agreement with the lifetime broadening of a Fermi liquid. Thus, the [open quotes]anomalous[close quotes] broadening of 2212 BiCaSrCuO cannot be automatically interpreted as evidence of non-Fermi-liquid behavior.

• Research Organization: Wisconsin Univ., Madison, WI (United States)
• OSTI ID: 7160620
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360207 -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
664200* -- Spectra of Atoms & Molecules & their Interactions with Photons-- (1992-)
665400 -- Quantum Physics Aspects of Condensed Matter-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
CUPRATES
EMISSION
EMISSION SPECTRA
HIGH-TC SUPERCONDUCTORS
INTERMETALLIC COMPOUNDS
LINE BROADENING
OXIDES
OXYGEN COMPOUNDS
PHOTOEMISSION
SECONDARY EMISSION
SPECTRA
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS