Angle-resolved photoemission study of heavily electron-doped BaFe2−Co As2
| Autor: | Yiming Xu, Lingli Li, K. Terashima, Pierre Richard, Takashi Takahashi, Y. Sekiba, J. H. Bowen, Takafumi Sato, Kosuke Nakayama, H. Ding, Guanghan Cao, Z. A. Xu |
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| Rok vydání: | 2010 |
| Předmět: |
Superconductivity
Materials science Condensed matter physics Photoemission spectroscopy Fermi level Energy Engineering and Power Technology Angle-resolved photoemission spectroscopy Electron Condensed Matter Physics Electronic Optical and Magnetic Materials Brillouin zone symbols.namesake Condensed Matter::Superconductivity Dispersion (optics) symbols Condensed Matter::Strongly Correlated Electrons Wave vector Electrical and Electronic Engineering |
| Zdroj: | Physica C: Superconductivity and its Applications. 470:S394-S396 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/j.physc.2009.11.137 |
| Popis: | We report results of angle-resolved photoemission spectroscopy on a heavily electron-doped BaFe2−xCoxAs2. By using synchrotron-radiation light, we have investigated the band dispersion near the Fermi level ( E F ) of BaFe2−xCoxAs2 (x = 0.3) for different wave vectors perpendicular to the crystal surface ( k z ) . We find that observed holelike band does not cross E F around Γ or Z point of the Brillouin zone, unlike the optimally- or under-doped samples. The holelike band also shows a finite k z dispersion of about 20 meV. These results indicate that the coexistence of hole and electron pockets connected by the antiferromagnetic wave vector plays an important role to the mechanism of superconductivity. |
| Databáze: | OpenAIRE |
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