Quantum critical behavior in an antiferromagnetic heavy-fermion Kondo lattice system(Ce1-xLax)2Ir3Ge5

The measurements on temperature dependences of magnetic susceptibility χ（T）, specific heat C（T）, and electrical resistivity ρ（T） were carried out for the antiferromagnetic（AFM）(Ce1-xLax)2Ir3Ge5（0 ≤ x ≤ 0.66） system. It was found that the Neel temperature TNdecreases with increasing La content x, and...

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Published in中国物理B：英文版 no. 1; pp. 442 - 447
Main Author Rajwali Khan 毛乾辉 王杭栋 杨金虎 杜建华 许彬杰 周宇星 张燕楠 陈斌 方明虎
Format Journal Article
LanguageEnglish
Published 2017
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Summary:The measurements on temperature dependences of magnetic susceptibility χ（T）, specific heat C（T）, and electrical resistivity ρ（T） were carried out for the antiferromagnetic（AFM）(Ce1-xLax)2Ir3Ge5（0 ≤ x ≤ 0.66） system. It was found that the Neel temperature TNdecreases with increasing La content x, and reaches 0 K near a critical content xcr =0.6. A new phase diagram was constructed based on these measurements. A non-Fermi liquid behavior in ρ（T） and a log T relationship in C（T） were found in the samples near xcr, indicating them to be near an AFM quantum critical point（QCP） with strong spin fluctuation. Our finding indicates that(Ce1-xLax)2Ir3Ge5 may be a new platform to search for unconventional superconductivity.
Bibliography:11-5639/O4
Rajwali Khan;Qianhui Mao;Hangdong Wang;Jinhu Yang;Jianhua Du;Binjie Xu;Yuxing Zhou;Yannan Zhang;Bing Chen;Minghu Fang;Department of Physics,Zhejiang University;Department of Physics,Hangzhou Normal University;Collaborative Innovation Center of Advanced Microstructures
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/26/1/017401