Photoemission and inverse resonant photoemission studies of Tl/sub 2/Ba/sub 2/Ca/sub 2/Cu/sub 3/O/sub 10+//sub y/

Journal Article · Sat Apr 01 04:00:00 EST 1989 · Phys. Rev. B: Condens. Matter; (United States)

OSTI ID:6335519

Meyer, III, H M; Wagener, T J; Weaver, J H; Ginley, D S

We present photoemission and inverse photoemission results for single and polycrystalline Tl/sub 2/Ba/sub 2-x/Ca/sub 2+//sub x/Cu/sub 3/O/sub 10+//sub y/. Studies of the occupied states reveal Cu-O and Tl 6s hybrid states within /similar to/8 eV of the Fermi level E/sub F/. Tl 4f emission characteristic of a single chemical environment, the Cu 2p/sub 3/2/ main line and satellites, complex O 1s emission derived from chemically inequivalent oxygen sites, and Ca and Ba emission reflecting Ca-Ba disorder within the unit cell were observed. Inverse-photoemission results show a low density of states within /similar to/1 eV of E/sub F/ and structure at /similar to/3, /similar to/7, 9.6, and 14 eV above E/sub F/ that is associated with Tl 6p, Ba 5d, Ca 3d, and Ba 4f empty levels. Resonant inverse-photoemission highlights the O 2p holes near E/sub F/. Differences and similarities to Bi/sub 2/Ca/sub 1+x/Sr/sub 2-//sub x/Cu/sub 2/O/sub 8+//sub y/ are discusse

• Research Organization: Department of Materials Science and Chemical Engineering, University of Minnesota, Minneapolis, Minnesota 55455
• OSTI ID: 6335519
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 39:10; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BINDING ENERGY
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COLLISIONS
COPPER COMPOUNDS
COPPER OXIDES
CRYSTALS
ELECTRON COLLISIONS
ELECTRONIC STRUCTURE
EMISSION
ENERGY
ENERGY LEVELS
ENERGY-LEVEL DENSITY
FERMI LEVEL
HYBRIDIZATION
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
PHOTOEMISSION
POLYCRYSTALS
SECONDARY EMISSION
SUPERCONDUCTORS
THALLIUM COMPOUNDS
THALLIUM OXIDES
TRANSITION ELEMENT COMPOUNDS