Probing Cerium 4f States across the Volume Collapse Transition by X-ray Raman ScatteringClick to copy article linkArticle link copied!
- Bijuan Chen*Bijuan Chen*E-mail: [email protected]. (B.C.)Center for High-Pressure Science & Technology Advanced Research, Beijing 100094, P.R. ChinaMore by Bijuan Chen
- Ekaterina M. Pärschke*Ekaterina M. Pärschke*E-mail: [email protected]. (E.M.P.)Department of Physics, University of Alabama at Birmingham, Birmingham, Alabama 35294, United StatesMore by Ekaterina M. Pärschke
- Wei-Chih ChenWei-Chih ChenDepartment of Physics, University of Alabama at Birmingham, Birmingham, Alabama 35294, United StatesMore by Wei-Chih Chen
- Brandon ScogginsBrandon ScogginsDepartment of Physics, University of North Georgia, Dahlonega, Georgia 30533, United StatesMore by Brandon Scoggins
- Bing LiBing LiCenter for High-Pressure Science & Technology Advanced Research, Beijing 100094, P.R. ChinaMore by Bing Li
- Mahalingam BalasubramanianMahalingam BalasubramanianAdvanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United StatesMore by Mahalingam Balasubramanian
- Steve HealdSteve HealdAdvanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United StatesMore by Steve Heald
- Jianbo ZhangJianbo ZhangCenter for High-Pressure Science & Technology Advanced Research, Beijing 100094, P.R. ChinaMore by Jianbo Zhang
- Hongshan DengHongshan DengCenter for High-Pressure Science & Technology Advanced Research, Beijing 100094, P.R. ChinaMore by Hongshan Deng
- Raimundas SereikaRaimundas SereikaCenter for High-Pressure Science & Technology Advanced Research, Beijing 100094, P.R. ChinaMore by Raimundas Sereika
- Yesudhas SorbYesudhas SorbCenter for High-Pressure Science & Technology Advanced Research, Beijing 100094, P.R. ChinaMore by Yesudhas Sorb
- Xia YinXia YinCenter for High-Pressure Science & Technology Advanced Research, Beijing 100094, P.R. ChinaMore by Xia Yin
- Yan BiYan BiCenter for High-Pressure Science & Technology Advanced Research, Beijing 100094, P.R. ChinaMore by Yan Bi
- Ke JinKe JinNational Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, ChinaMore by Ke Jin
- Qiang WuQiang WuNational Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, ChinaMore by Qiang Wu
- Cheng-Chien Chen*Cheng-Chien Chen*E-mail: [email protected]. (C.-C.C.)Department of Physics, University of Alabama at Birmingham, Birmingham, Alabama 35294, United StatesMore by Cheng-Chien Chen
- Yang Ding*Yang Ding*E-mail: [email protected]. (Y.D.)Center for High-Pressure Science & Technology Advanced Research, Beijing 100094, P.R. ChinaMore by Yang Ding
- Ho-kwang MaoHo-kwang MaoCenter for High-Pressure Science & Technology Advanced Research, Beijing 100094, P.R. ChinaGeophysical Laboratory, Carnegie Institution of Washington, Washington, D.C. 20015, United StatesMore by Ho-kwang Mao
Abstract
Understanding the volume collapse phenomena in rare-earth materials remains an important challenge due to a lack of information on 4f electronic structures at different pressures. Here, we report the first high-pressure inelastic X-ray scattering measurement on elemental cerium (Ce) metal. By overcoming the ultralow signal issue in the X-ray measurement at the Ce N4,5-edge, we observe the changes of unoccupied 4f states across the volume collapse transition around 0.8 GPa. To help resolve the longstanding debate on the Anderson–Kondo and Mott–Hubbard models, we further compare the experiments with extended multiplet calculations that treat both screening channels on equal footing. The results indicate that a modest change in the 4f–5d Kondo coupling can well describe the spectral redistribution across the volume collapse, whereas the hybridization between neighboring atoms in the Hubbard model appears to play a minor role. Our study helps to constrain the theoretical models and opens a promising new route for systematic investigation of volume collapse phenomena in rare-earth materials.
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