Effect of f–c hybridization on theγ→αphase transition of cerium studied by lanthanum doping

作     者：Yong-Huan Wang Yun Zhang Yu Liu Xiao Tan Ce Ma Yue-Chao Wang Qiang Zhang Deng-Peng Yuan Dan Jian Jian Wu Chao Lai Xi-Yang Wang Xue-Bing Luo Qiu-Yun Chen Wei Feng Qin Liu Qun-Qing Hao Yi Liu Shi-Yong Tan Xie-Gang Zhu Hai-Feng Song Xin-Chun Lai 王永欢;张云;刘瑜;谈笑;马策;王越超;张强;袁登鹏;简单;吴健;赖超;王西洋;罗学兵;陈秋云;冯卫;刘琴;郝群庆;刘毅;谭世勇;朱燮刚;宋海峰;赖新春

作者机构：Science and Technology on Surface Physics and Chemistry LaboratoryJiangyou 621908China Laboratory of Computational PhysicsInstitute of Applied Physics and Computational MathematicsBeijing 100088China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2022年第31卷第8期

页      面：165-172页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Project supported by the National Key Research and Development Program of China(Grant Nos.2021YFA1601100 and 2017YFA0303104) the SPC-Lab Research Fund(Grant No.WDZC201901) the Science Challenge Project(Grant Nos.TZ2016004 and TZ2018002) the National Natural Science Foundation of China(Grant Nos.U1630248,11774320,and 11904334) Special Funds of Institute of Materials(Grant No.TP02201904) the Development Funds(Grant No.JZX7Y201901SY00900107) 

主　　题：structural phase transition molecular beam epitaxy ARPES f-electron system 

摘      要：The hybridization between the localized 4f level(f) with conduction(c) electrons in γ-Ce upon cooling has been previously revealed in single crystalline thin films experimentally and theoretically, whereas its influence on the γ → α phase transition was not explicitly verified, due to the fact that the phase transition happened in the bulk-layer, leaving the surface in the γ phase. Here in our work, we circumvent this issue by investigating the effect of alloying addition of La on Ce, by means of crystal structure, electronic transport and angle resolved photoemission spectroscopy measurements, together with a phenomenological periodic Anderson model and a modified Anderson impurity model. Our current researches indicate that the weakening of f–c hybridization is the major factor in the suppression of γ → α phase transition by La doping. The consistency of our results with the effects of other rare earth and actinide alloying additions on the γ → α phase transition of Ce is also discussed. Our work demonstrates the importance of the interaction between f and c electrons in understanding the unconventional phase transition in Ce, which is intuitive for further researches on other rare earth and actinide metals and alloys with similar phase transition behaviors.