Hybridization of Bogoliubov-quasiparticles between adjacent CuO$_2$ layers in the triple-layer cuprate Bi$_2$Sr$_2$Ca$_2$Cu$_3$O$_{10+\delta}$ studied by ARPES
| Autor: | Ideta, S., Johnston, S., Yoshida, T., Tanaka, K., Mori, M., Anzai, H., Ino, A., Arita, M., Namatame, H., Taniguchi, M., Ishida, S., Takashima, K., Kojima, K. M., Devereaux, T. P., Uchida, S., Fujimori, A. |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Physical Review Letters 127, 217004 (2021) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.127.217004 |
| Popis: | Hybridization of Bogoliubov quasiparticles (BQPs) between the CuO$_2$ layers in the triple-layer cuprate high-temperature superconductor Bi$_2$Sr$_2$Ca$_2$Cu$_3$O$_{10+\delta}$ is studied by angle-resolved photoemission spectroscopy (ARPES). In the superconducting state, an anti-crossing gap opens between the outer- and inner-BQP bands, which we attribute primarily to interlayer single-particle hopping with possible contributions from interlayer Cooper pairing. We find that the $d$-wave superconducting gap of both BQP bands smoothly develops with momentum without abrupt jump in contrast to a previous ARPES study. Hybridization between the BQPs also gradually increases in going from the off-nodal to the anti-nodal region, which is explained by the momentum-dependence of the interlayer single-particle hopping. As possible mechanisms for the enhancement of the superconducting transition temperature, the hybridization between the BQPs, as well as the combination of phonon modes of the triple CuO$_2$ layers and spin fluctuations are discussed. Comment: 14 pages, 10 figures |
| Databáze: | arXiv |
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