Out-of-phase Plasmon Excitations in the Trilayer Cuprate Bi$_2$Sr$_2$Ca$_2$Cu$_3$O$_{10+δ}$
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| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866916700871458816 |
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| author | Nakata, S. Bejas, M. Okamoto, J. Yamamoto, K. Shiga, D. Takahashi, R. Huang, H. Y. Kumigashira, H. Wadati, H. Miyawaki, J. Ishida, S. Eisaki, H. Fujimori, A. Greco, A. Yamase, H. Huang, D. J. Suzuki, H. |
| author_facet | Nakata, S. Bejas, M. Okamoto, J. Yamamoto, K. Shiga, D. Takahashi, R. Huang, H. Y. Kumigashira, H. Wadati, H. Miyawaki, J. Ishida, S. Eisaki, H. Fujimori, A. Greco, A. Yamase, H. Huang, D. J. Suzuki, H. |
| contents | Within a homologous series of cuprate superconductors, variations in the stacking of CuO$_2$ layers influence the collective charge dynamics through the long-range Coulomb interactions. We use O $K$-edge resonant inelastic x-ray scattering to reveal plasmon excitations in the optimally-doped trilayer Bi$_2$Sr$_2$Ca$_2$Cu$_3$O$_{10+δ}$. The observed plasmon exhibits nearly $q_z$-independent dispersion and a large excitation gap of approximately 300 meV. This mode is primarily ascribed to the $ω_{-}$ mode, where the charge density on the outer CuO$_2$ sheets oscillates out of phase while the density in the inner sheet remains unaltered at $q_z=0$. The intensity of the acoustic $ω_3$ mode is relatively weak and becomes vanishingly small near $(q_x, q_y)=(0, 0)$. This result highlights a qualitative change in the eigenmode of the dominant low-energy plasmon with the number of CuO$_2$ layers. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2502_03779 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Out-of-phase Plasmon Excitations in the Trilayer Cuprate Bi$_2$Sr$_2$Ca$_2$Cu$_3$O$_{10+δ}$ Nakata, S. Bejas, M. Okamoto, J. Yamamoto, K. Shiga, D. Takahashi, R. Huang, H. Y. Kumigashira, H. Wadati, H. Miyawaki, J. Ishida, S. Eisaki, H. Fujimori, A. Greco, A. Yamase, H. Huang, D. J. Suzuki, H. Strongly Correlated Electrons Within a homologous series of cuprate superconductors, variations in the stacking of CuO$_2$ layers influence the collective charge dynamics through the long-range Coulomb interactions. We use O $K$-edge resonant inelastic x-ray scattering to reveal plasmon excitations in the optimally-doped trilayer Bi$_2$Sr$_2$Ca$_2$Cu$_3$O$_{10+δ}$. The observed plasmon exhibits nearly $q_z$-independent dispersion and a large excitation gap of approximately 300 meV. This mode is primarily ascribed to the $ω_{-}$ mode, where the charge density on the outer CuO$_2$ sheets oscillates out of phase while the density in the inner sheet remains unaltered at $q_z=0$. The intensity of the acoustic $ω_3$ mode is relatively weak and becomes vanishingly small near $(q_x, q_y)=(0, 0)$. This result highlights a qualitative change in the eigenmode of the dominant low-energy plasmon with the number of CuO$_2$ layers. |
| title | Out-of-phase Plasmon Excitations in the Trilayer Cuprate Bi$_2$Sr$_2$Ca$_2$Cu$_3$O$_{10+δ}$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2502.03779 |