Quantum critical behavior in an antiferromagnetic heavy-fermion Kondo lattice system(Ce(1-x)Lax)2Ir3Ge5  

作　　者：Rajwali Khan Qianhui Mao Hangdong Wang Jinhu Yang Jianhua Du Binjie Xu Yuxing Zhou Yannan Zhang Bing Chen Minghu Fang 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(Department of Physics, Zhejiang University, Hangzhou 310027, China;Department of Physics, Hangzhou Normal University, Hangzhou 310036, China;Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China)

机构地区：[1]Department of Physics, Zhejiang University, Hangzhou 310027, China [2]Department of Physics, Hangzhou Normal University, Hangzhou 310036, China [3]Collaborative Innovation Center of Advanced Microstructures, Nanfing 210093, China

出　　处：《Chinese Physics B》2017年第1期438-443,共6页中国物理B（英文版）

基　　金：supported by the National Basic Research Program of China(Grant Nos.2016FYA0300402,2015CB921004,and 2012CB821404);the National Natural Science Foundation of China(Grant Nos.11374261 and 11204059)

摘　　要：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）（Ce（1-x）Lax）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（Ce（1-x）Lax）2Ir3Ge5 may be a new platform to search for unconventional superconductivity.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）（Ce（1-x）Lax）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（Ce（1-x）Lax）2Ir3Ge5 may be a new platform to search for unconventional superconductivity.

关 键 词：quantum critical point antiferromagnetic Kondo lattice system （Ce1-xLax）2Ir3Ge5 

分 类 号：O469[理学—凝聚态物理]