Published September 1, 1987
| Version v1
Journal article
Unoccupied electronic states and surface phenomena for YBa2Cu3O/sub 6.9/
- 1. Department of Chemical Engineering and Materials Science, University of Minneosta, Minneapolis, Minnesota 55455
Description
Inverse photoemission was used to probe the unoccupied electronic levels within 25 eV of E/sub F/ for the high-temperature superconductor YBa2Cu3O/sub 6.9/. Our results show that the density of states is low from E/sub F/ to --3.7 eV above E/sub F/. Large emission features appearing at 6.6 and 8.6 eV are associated with Ba 5d- and Y 4d-derived bands, respectively, while structure at 13.4 eV above E/sub F/ is due to localized Ba 4f states. Energy-dependent studies reveal a dispersive band between --4 and --6 eV above E/sub F/. An oxygen-induced feature was observed at 1.8 eV, but there is no evidence that high-energy electron-stimulated desorption removes these chemisorption states
Additional details
Publishing Information
- Journal Title
- Phys. Rev., B: Condens. Matter
- Journal Volume
- 36
- Journal Issue
- 7
- Series
- Phys. Rev., B: Condens. Matter.
- Journal Page Range
- 3899-3902
- ISSN
- 0163-1829
- CODEN
- PRBMD
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 19008032
- Subject category
- S36: MATERIALS SCIENCE; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- BAND THEORY; BARIUM OXIDES; CHEMISORPTION; COPPER OXIDES; ELECTRON COLLISIONS; ELECTRONIC STRUCTURE; ENERGY-LEVEL DENSITY; EV RANGE 10-100; EV RANGE 100-1000; KEV RANGE 01-10; PHOTON EMISSION; SUPERCONDUCTORS; YTTRIUM OXIDES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; CHEMICAL REACTIONS; COLLISIONS; COPPER COMPOUNDS; EMISSION; ENERGY RANGE; EV RANGE; KEV RANGE; OXIDES; OXYGEN COMPOUNDS; SEPARATION PROCESSES; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS