High-resolution angle-resolved photoemission study of bulk electronic states in
| Autor: | Takafumi Sato, Takashi Takahashi, Norio Kobayashi, Kosuke Nakayama, Terukazu Nishizaki, Yatsuhiro Takahashi |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Superconductivity
Materials science Condensed matter physics Photoemission spectroscopy Inverse photoemission spectroscopy Fermi level Angle-resolved photoemission spectroscopy General Chemistry Electronic structure Photon energy Condensed Matter Physics Antibonding molecular orbital symbols.namesake Condensed Matter::Superconductivity symbols Condensed Matter::Strongly Correlated Electrons General Materials Science |
| Zdroj: | Journal of Physics and Chemistry of Solids. 69:2967-2970 |
| ISSN: | 0022-3697 |
| DOI: | 10.1016/j.jpcs.2008.06.019 |
| Popis: | We have studied low-energy electronic structure of YBa 2 Cu 3 O 7 - δ using high-resolution angle-resolved photoemission spectroscopy (ARPES). By carefully tuning photon energy and polarization of incident light, we identified five different bands in the vicinity of the Fermi level, those are surface-bilayer-derived bonding and antibonding bands, their bulk counterparts, and CuO-chain-derived band, respectively. The surface bands show metallic property reflecting highly overdoped character, while bulk bands show signature of a d x 2 - y 2 -wave superconducting gap opening. The present ARPES result suggests the universality of the bulk electronic states in bilayer high- T c superconductors. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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