Saved in:
| Main Authors: | , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2023
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2305.06103 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866914660182130688 |
|---|---|
| author | Liu, Zhe Zhang, Yingjie Huang, Shenyang Ming, Xue Li, Qing Pan, Chenghao Dai, Yaomin Zhou, Xiaoxiang Zhu, Xiyu Yan, Hugen Wen, Hai-Hu |
| author_facet | Liu, Zhe Zhang, Yingjie Huang, Shenyang Ming, Xue Li, Qing Pan, Chenghao Dai, Yaomin Zhou, Xiaoxiang Zhu, Xiyu Yan, Hugen Wen, Hai-Hu |
| contents | The pressure-induced color change in the nitrogen-doped lutetium hydride has triggered extensive discussions about the underlying physics. Here, we study the optical response of LuH$_{2 \pm x}$N$_{y}$ in a broad frequency range at ambient pressure and its evolution with pressure in the visible spectral range. The broad-band optical spectra at ambient pressure reveal a Drude component associated with intra-band electronic transitions and two Lorentz components (L1 and L2) arising from inter-band electronic transitions. The application of pressure causes a spectral weight transfer from L1 to the Drude component, leading to a blue shift of the plasma edge in the reflectivity spectrum alongside a reduction of the high-frequency reflectivity. Our results suggest that the pressure-induced color change in LuH$_{2 \pm x}$N$_{y}$ is closely related to the transformation between intra- and inter-band electronic transitions, providing new insights into the mechanism of the pressure-induced color change in LuH$_{2 \pm x}$N$_{y}$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_06103 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Pressure-induced color change arising from transformation between intra- and inter-band transitions in LuH$_{2\pm x}$N$_{y}$ Liu, Zhe Zhang, Yingjie Huang, Shenyang Ming, Xue Li, Qing Pan, Chenghao Dai, Yaomin Zhou, Xiaoxiang Zhu, Xiyu Yan, Hugen Wen, Hai-Hu Superconductivity Materials Science The pressure-induced color change in the nitrogen-doped lutetium hydride has triggered extensive discussions about the underlying physics. Here, we study the optical response of LuH$_{2 \pm x}$N$_{y}$ in a broad frequency range at ambient pressure and its evolution with pressure in the visible spectral range. The broad-band optical spectra at ambient pressure reveal a Drude component associated with intra-band electronic transitions and two Lorentz components (L1 and L2) arising from inter-band electronic transitions. The application of pressure causes a spectral weight transfer from L1 to the Drude component, leading to a blue shift of the plasma edge in the reflectivity spectrum alongside a reduction of the high-frequency reflectivity. Our results suggest that the pressure-induced color change in LuH$_{2 \pm x}$N$_{y}$ is closely related to the transformation between intra- and inter-band electronic transitions, providing new insights into the mechanism of the pressure-induced color change in LuH$_{2 \pm x}$N$_{y}$. |
| title | Pressure-induced color change arising from transformation between intra- and inter-band transitions in LuH$_{2\pm x}$N$_{y}$ |
| topic | Superconductivity Materials Science |
| url | https://arxiv.org/abs/2305.06103 |