Surface study of the 83-K superconductor Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8/ by low-energy electron diffraction and angle-resolved inverse photoemission spectroscopy

Journal Article · Sat Apr 01 00:00:00 EST 1989 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.39.7316· OSTI ID:6407553

Claessen, R; Manzke, R; Carstensen, H; Burandt, B; Buslaps, T; Skibowski, M; Fink, J

Low-energy-electron-diffraction (LEED) and angle-resolved inverse photoemission spectroscopy (ARIPES) have been applied to the cleaved surface of Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8/ single crystals. The LEED pattern shows a surface lattice which is identical to the superlattice found in the bulk structure. ARIPES along the GAMMAX(a/sup */) direction yields nondispersive unoccupied electronic states at 2.9 and /similar to/5 eV above the Fermi energy attributed to Bi-O derived conduction bands. At 0.47 GAMMAX the experimental density of states at the Fermi level increases. This may be due to the crossing of the O(1) band through E/sub F/ derived from oxygen atoms in the Cu-O planes.

• Research Organization: Institut fuer Experimentalphysik, Universitaet Kiel, D-2300 Kiel, Federal Republic of Germany
• OSTI ID: 6407553
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 39:10
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BISMUTH OXIDES
SURFACE PROPERTIES
CALCIUM OXIDES
COPPER OXIDES
STRONTIUM OXIDES
CLEAVAGE
ELECTRON DIFFRACTION
MONOCRYSTALS
SUPERCONDUCTORS
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
CRYSTAL STRUCTURE
CRYSTALS
DIFFRACTION
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
SCATTERING
STRONTIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
656100 - Condensed Matter Physics- Superconductivity