中国科学:物理学 力学 天文学(英文版)2024，Vol.67Issue(2) ：161-166.DOI:10.1007/s11433-023-2222-3

Pressure-induced color change arising from transformation between intra-and inter-band transitions in LuH2±xNy

Zhe Liu Yingjie Zhang Shenyang Huang Xue Ming Qing Li Chenghao Pan Yaomin Dai Xiaoxiang Zhou Xiyu Zhu Hugen Yan Hai-Hu Wen
中国科学:物理学 力学 天文学(英文版)2024，Vol.67Issue(2) ：161-166.DOI:10.1007/s11433-023-2222-3
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Pressure-induced color change arising from transformation between intra-and inter-band transitions in LuH2±xNy

Zhe Liu 1Yingjie Zhang 1Shenyang Huang 2Xue Ming 1Qing Li 1Chenghao Pan 2Yaomin Dai 1Xiaoxiang Zhou 1Xiyu Zhu 1Hugen Yan 2Hai-Hu Wen1
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作者信息

  • 1. Center for Superconducting Physics and Materials,National Laboratory of Solid State Microstructures and Department of Physics,National Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China
  • 2. State Key Laboratory of Surface Physics,Key Laboratory of Micro and Nano-Photonic Structures of the Ministry of Education,Department of Physics,Fudan University,Shanghai 200433,China
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Abstract

The pressure-induced color change in the nitrogen-doped lutetium hydride has triggered extensive discussions about the underly-ing physics and potential applications.Here,we study the optical response of LuH2±xNy 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 re-veal 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 LuH2±xNy 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 LuH2±xNy.

Key words

nitrogen-doped lutetium hydride/optical spectroscopy/high-pressure technique/color change

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基金项目

National Key R&D Program of China(2022YFA1403201)

National Key R&D Program of China(2022YFA1404700)

National Natural Science Foundation of China(12174180)

National Natural Science Foundation of China(12074085)

National Natural Science Foundation of China(12204231)

National Natural Science Foundation of China(12061131001)

Fundamental Research Funds for the Central Universities(020414380095)

Jiangsu Shuangchuang Program()

出版年

2024
中国科学:物理学 力学 天文学(英文版)
中国科学院

中国科学:物理学 力学 天文学(英文版)

CSTPCD
影响因子：0.91
ISSN：1674-7348
参考文献量36
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