Positron 2D-ACAR experiments and electron-positron momentum density in YBa{sub 2}Cu{sub 3}O{sub 7-x}
Conference
·
OSTI ID:10117280
- Argonne National Lab., IL (United States)
- Northeastern Univ., Boston, MA (United States). Dept. of Physics
We discuss positron annihilation (2D-ACAR) measurements in the C- projection on an untwinned metallic single crystal of YBa{sub 2}Cu{sub 3}O{sub 7-x} as a function of temperature, for five temperatures ranging from 30K to 300K. The measured 2D-ACAR intensities are interpreted in terms of the electron-positron momentum density obtained within the KKR-band theory framework. The temperature dependence of the 2D-ACAR spectra is used to extract a ``background corrected`` experimental spectrum which is in remarkable accord with the corresponding band theory predictions, and displays in particular clear signatures of the electron ridge Fermi surface.
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 10117280
- Report Number(s):
- ANL/CP-75121; CONF-911202-45; ON: DE92006985; CNN: Contract STC-8809854
- Resource Relation:
- Conference: Annual fall meeting of the Materials Research Society (MRS),Boston, MA (United States),2-6 Dec 1991; Other Information: PBD: Dec 1991
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HIGH-TC SUPERCONDUCTORS
ELECTRONIC STRUCTURE
COPPER OXIDES
BARIUM OXIDES
YTTRIUM OXIDES
TEMPERATURE DEPENDENCE
CRYSTALS
ELECTRON DENSITY
POSITRONS
360204
665100
PHYSICAL PROPERTIES
NUCLEAR TECHNIQUES IN CONDENSED MATTER PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HIGH-TC SUPERCONDUCTORS
ELECTRONIC STRUCTURE
COPPER OXIDES
BARIUM OXIDES
YTTRIUM OXIDES
TEMPERATURE DEPENDENCE
CRYSTALS
ELECTRON DENSITY
POSITRONS
360204
665100
PHYSICAL PROPERTIES
NUCLEAR TECHNIQUES IN CONDENSED MATTER PHYSICS