Resolving Phonons in Superconductor Bi2Sr2CaCu2O8+δ at Sub-Unit-Cell Resolution
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2025
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866915348211564544 |
|---|---|
| author | Zhang, Xiaowen Li, Jiade Gao, Xiaoyue Shi, Ruochen Han, Bo Li, Xiaomei Du, Jinlong Wen, Jinsheng Gu, Genda Wang, Shichong Zhang, Wentao Gao, Peng |
| author_facet | Zhang, Xiaowen Li, Jiade Gao, Xiaoyue Shi, Ruochen Han, Bo Li, Xiaomei Du, Jinlong Wen, Jinsheng Gu, Genda Wang, Shichong Zhang, Wentao Gao, Peng |
| contents | The role of phonons in cuprates remains controversial, with their complex lattice structure complicating the investigation. Here, we identify phonon modes originating from charge reservoir and superconducting layers of Bi2Sr2CaCu2O8+δ using sub-unit-cell resolved electron energy loss spectroscopy in a scanning transmission electron microscope. We reveal several phonon modes exhibiting layer-specific localization: ~78 meV in-plane modes localized in the CuO2 planes, ~42 meV hybrid (in-plane and out-of-plane) modes in the CuO2 planes, and ~38 meV hybrid modes in the BiO layers. We also observe a periodic modulation of phonon frequencies induced by the superstructure, spatially correlating with the superconducting gap variation. Our findings offer new insights into the electron-phonon coupling in cuprates, fostering deeper exploration of the microscopic linkage between lattice dynamics and superconductivity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_14127 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Resolving Phonons in Superconductor Bi2Sr2CaCu2O8+δ at Sub-Unit-Cell Resolution Zhang, Xiaowen Li, Jiade Gao, Xiaoyue Shi, Ruochen Han, Bo Li, Xiaomei Du, Jinlong Wen, Jinsheng Gu, Genda Wang, Shichong Zhang, Wentao Gao, Peng Superconductivity Materials Science The role of phonons in cuprates remains controversial, with their complex lattice structure complicating the investigation. Here, we identify phonon modes originating from charge reservoir and superconducting layers of Bi2Sr2CaCu2O8+δ using sub-unit-cell resolved electron energy loss spectroscopy in a scanning transmission electron microscope. We reveal several phonon modes exhibiting layer-specific localization: ~78 meV in-plane modes localized in the CuO2 planes, ~42 meV hybrid (in-plane and out-of-plane) modes in the CuO2 planes, and ~38 meV hybrid modes in the BiO layers. We also observe a periodic modulation of phonon frequencies induced by the superstructure, spatially correlating with the superconducting gap variation. Our findings offer new insights into the electron-phonon coupling in cuprates, fostering deeper exploration of the microscopic linkage between lattice dynamics and superconductivity. |
| title | Resolving Phonons in Superconductor Bi2Sr2CaCu2O8+δ at Sub-Unit-Cell Resolution |
| topic | Superconductivity Materials Science |
| url | https://arxiv.org/abs/2506.14127 |