Topology of the fermi surface and band structure near the fermi level in the Pb-doped Bi2Sr2CuO6+δ superconductor
| Autor: | Hiroshi Ikuta, Shik Shin, Takayoshi Yokoya, Uichiro Mizutani, M. Matsuura, Takeshi Kondo, K. Jinno, T. Takeuchi |
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| Rok vydání: | 2001 |
| Předmět: |
Physics
Radiation Condensed matter physics Fermi level Quantum oscillations Fermi surface Fermi energy Condensed Matter Physics Atomic and Molecular Physics and Optics Shubnikov–de Haas effect Electronic Optical and Magnetic Materials Condensed Matter::Materials Science symbols.namesake Condensed Matter::Superconductivity symbols Condensed Matter::Strongly Correlated Electrons Physical and Theoretical Chemistry Pseudogap Fermi gas Spectroscopy Quasi Fermi level |
| Zdroj: | Journal of Electron Spectroscopy and Related Phenomena. :629-634 |
| ISSN: | 0368-2048 |
| DOI: | 10.1016/s0368-2048(00)00354-6 |
| Popis: | We report the doping level dependence of the band dispersion and the shape of the Fermi surface for Pb-doped Bi 2 Sr 2 CuO 6+ δ superconductor by use of angle resolved photoemission spectroscopy with extremely high angular and energy resolutions. It is found that the band dispersion of Bi 2 Sr 2 CuO 6+ δ is fairly rigid regardless of its doping level in the over-doped range, and that it shifts toward higher binding energy with decreasing doping. We also found that one of the heavily over-doped samples possesses an electron-like Fermi surface centered at (0,0) point, while less doped samples show a hole-like Fermi surface. This is the first observation of the transformation between electron-like and hole-like Fermi surfaces with varying the doping level in Bi 2 Sr 2 CuO 6+ δ . |
| Databáze: | OpenAIRE |
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