Electronic structure in high temperature superconducting oxides

Conference · Tue Aug 20 00:00:00 EDT 1991

OSTI ID:10125574

Howell, R H; Sterne, P; Solal, F; Fluss, M J; Tobin, J; O`Brien, J; Radousky, H B ^[1]; Haghighi, H; Kaiser, J H; Rayner, S L; West, R N ^[2]; Liu, J Z; Shelton, R ^[3]; Olsen, C G; Gu, C ^[4]; Kitazawa, K ^[5]; Kojima, H ^[6]

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1. Lawrence Livermore National Lab., CA (United States)
2. Texas Univ., Arlington, TX (United States)
3. California Univ., Davis, CA (United States)
4. Ames Lab., IA (United States)
5. Tokyo Univ. (Japan)
6. Yamanashi Univ., Kofu (Japan)

We have performed measurements on entwined single crystals of YBCO using both photoemission and positron angular correlation of annihilation radiation and on single crystals of LSCO using only angular correlation. Fermi surface features in good agreement with band theory were found and identified in all of the measurements. In photoemission the Fermi momentum was fixed for several points and the band dispersion below the Fermi energy was mapped. In positron angular correlation measurements the shape of the Fermi surface was mapped for the CuO chains (YBCO) and the CuO planes (LSCO). Demonstration of the existence of Fermi surfaces in the HTSC materials points a direction for future theoretical considerations.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 10125574
• Report Number(s): UCRL-JC-108266; CONF-9108150-8; ON: DE92008566
• Resource Relation: Conference: 9. international conference on positron annihilation,Szombathely (Hungary),26-31 Aug 1991; Other Information: PBD: 20 Aug 1991
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HIGH-TC SUPERCONDUCTORS
ELECTRONIC STRUCTURE
COPPER OXIDES
BARIUM OXIDES
YTTRIUM OXIDES
FERMI LEVEL
ELECTRON-POSITRON INTERACTIONS
STRONTIUM OXIDES
LANTHANUM OXIDES
360204
665411
PHYSICAL PROPERTIES
BASIC SUPERCONDUCTIVITY STUDIES