Ce-Site Dilution in the Ferromagnetic Kondo Lattice CeRh6Ge4

• 作者: Jia-Cheng Xu Hang Su Rohit Kumar Shuai-Shuai Luo Zhi-Yong Nie An Wang Feng Du Rui Li Michael Smidman Hui-Qiu Yuan
• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2021,（8）
• 所属期刊栏目: CONDENSED MATTER:ELECTRONIC STRUCTURE,ELECTRICAL,MAGNETIC,AND OPTICAL PROPERTIES
• 页码范围: 89-93
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/0256-307X/38/8/087101

摘要

The heavy fermion ferromagnet CeRh6Ge4 is the first example of a clean stoichiometric system where the fer-romagnetic transition can be continuously suppressed by hydrostatic pressure to a quantum critical point.In order to reveal the outcome when the magnetic lattice of CeRh6Ge4 is diluted with non-magnetic atoms,this study reports comprehensive measurements of the physical properties of both single crystal and polycrystalline samples of LaxCe1-xRh6Ge4.With increasing x,the Curie temperature decreases,and no transition is observed for x＞0.25,while the system evolves from exhibiting coherent Kondo lattice behaviors at low x to the Kondo impurity scenario at large x.Moreover,non-Fermi liquid behavior is observed over a wide doping range,which agrees well with the disordered Kondo model for 0.52≤x≤0.66,while strange metal behavior is revealed in the vicinity of xc=0.26.