| Autor: |
Shi, M., Bendounan, A., Razzoli, E., Rosenkranz, S., Norman, M. R., Campuzano, J. C., Chang, J., Mansson, M., Sassa, Y., Claesson, T., Tjernberg, O., Patthey, L., Momono, N., Oda, M., Ido, M., Guerrero, S., Mudry, C., Mesot, J. |
| Rok vydání: |
2008 |
| Předmět: |
|
| Zdroj: |
EPL, 88 (2009) 27008 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1209/0295-5075/88/27008 |
| Popis: |
Angle-resolved photoemission on underdoped La$_{1.895}$Sr$_{0.105}$CuO$_4$ reveals that in the pseudogap phase, the dispersion has two branches located above and below the Fermi level with a minimum at the Fermi momentum. This is characteristic of the Bogoliubov dispersion in the superconducting state. We also observe that the superconducting and pseudogaps have the same d-wave form with the same amplitude. Our observations provide direct evidence for preformed Cooper pairs, implying that the pseudogap phase is a precursor to superconductivity. |
| Databáze: |
arXiv |
| Externí odkaz: |
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