Large momentum-dependence of the main dispersion 'kink' in the high-Tc superconductor Bi2Sr2CaCu2O8+{\delta}
| Autor: | Plumb, N. C., Reber, T. J., Iwasawa, H., Cao, Y., Arita, M., Shimada, K., Namatame, H., Taniguchi, M., Yoshida, Y., Eisaki, H., Aiura, Y., Dessau, D. S. |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | New J. Phys. 15, 113004 (2013) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/1367-2630/15/11/113004 |
| Popis: | Ultrahigh resolution angle-resolved photoemission spectroscopy with low-energy photons is used to study the detailed momentum dependence of the well-known nodal "kink" dispersion anomaly of Bi2Sr2CaCu2O8+{\delta}. We find that the kink's location transitions smoothly from a maximum binding energy of about 65 meV at the node of the d-wave superconducting gap to 55 meV roughly one-third of the way to the antinode. Meanwhile, the self-energy spectrum corresponding to the kink dramatically sharpens and intensifies beyond a critical point in momentum space. We discuss the possible bosonic spectrum in energy and momentum space that can couple to the k-space dispersion of the electronic kinks. Comment: 13 pages, 3 figures. Updates to text and Fig. 2 matching final published version |
| Databáze: | arXiv |
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