Low-frequency interlayer phonon dynamics and photoinduced terahertz absorption in black phosphorus
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2025
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866911139001008128 |
|---|---|
| author | Huang, Haiyun Chen, Cheng Zhai, Yuxin Zhang, Xiu Zhu, Junzhi Wang, Junyong Zhang, Kai Xiong, Qihua Liu, Haiyun |
| author_facet | Huang, Haiyun Chen, Cheng Zhai, Yuxin Zhang, Xiu Zhu, Junzhi Wang, Junyong Zhang, Kai Xiong, Qihua Liu, Haiyun |
| contents | The strong interlayer coupling in black phosphorus (BP), arising from wavefunction overlap between layers, is critical for understanding its electronic and optical properties. Here, we utilize terahertz (THz) spectroscopy to study phonon dynamics in BP. We identify two peaks at 6 and 8.5 meV in steady-state THz spectra, which are attributed to low-frequency interlayer phonon modes. Both modes exhibit anharmonic phonon coupling behavior below 150 K, manifesting as temperature-dependent red-shifts. Using time-resolved THz spectroscopy, we observe significantly increased THz absorption under photoexcitation, arising from the transient enhancements of the extended Drude component and the oscillator strengths of interlayer phonons in non-equilibrium. These findings highlight the critical role of interlayer phonon dynamics in understanding many-body physics in BP. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_04822 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Low-frequency interlayer phonon dynamics and photoinduced terahertz absorption in black phosphorus Huang, Haiyun Chen, Cheng Zhai, Yuxin Zhang, Xiu Zhu, Junzhi Wang, Junyong Zhang, Kai Xiong, Qihua Liu, Haiyun Strongly Correlated Electrons Materials Science The strong interlayer coupling in black phosphorus (BP), arising from wavefunction overlap between layers, is critical for understanding its electronic and optical properties. Here, we utilize terahertz (THz) spectroscopy to study phonon dynamics in BP. We identify two peaks at 6 and 8.5 meV in steady-state THz spectra, which are attributed to low-frequency interlayer phonon modes. Both modes exhibit anharmonic phonon coupling behavior below 150 K, manifesting as temperature-dependent red-shifts. Using time-resolved THz spectroscopy, we observe significantly increased THz absorption under photoexcitation, arising from the transient enhancements of the extended Drude component and the oscillator strengths of interlayer phonons in non-equilibrium. These findings highlight the critical role of interlayer phonon dynamics in understanding many-body physics in BP. |
| title | Low-frequency interlayer phonon dynamics and photoinduced terahertz absorption in black phosphorus |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2509.04822 |