Journal
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
Volume 79, Issue 10, Pages -Publisher
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.79.103704
Keywords
12CaO center dot 7Al(2)O(3); electronic structure; photoemission spectroscopy; superconductivity
Categories
Funding
- JST-CREST
- Japan Society for the Promotion of Science (JSPS)
- Ministry of Education, Culture, Sports, Science and Technology (MEXT)
- FIRST Program of Japan
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We have performed low-energy high-resolution photoemission spectroscopy of a superconducting cement 12CaO center dot 7Al(2)O(3) (C12A7). By using the bulk-sensitive xenon-plasma light, we clearly observed a small but well-defined peak at the Fermi level (E-F). Comparison with the band calculations suggests that the observed near-E-F peak is ascribed to the conduction electrons distributed over the crystal cages responsible for the metallic nature and superconductivity of C12A7.
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