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

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

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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.

nitrogen-doped lutetium hydrideoptical spectroscopyhigh-pressure techniquecolor change

Zhe Liu、Yingjie Zhang、Shenyang Huang、Xue Ming、Qing Li、Chenghao Pan、Yaomin Dai、Xiaoxiang Zhou、Xiyu Zhu、Hugen Yan、Hai-Hu Wen

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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

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

National Key R&D Program of ChinaNational Key R&D Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaFundamental Research Funds for the Central UniversitiesJiangsu Shuangchuang Program

2022YFA14032012022YFA140470012174180120740851220423112061131001020414380095

2024

10.1007/s11433-023-2222-3

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
年,卷(期)：2024.67(2)
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