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

doi:10.1088/1674-1056/26/1/017401

中国物理B ›› 2017, Vol. 26 ›› Issue (1): 17401-017401.doi: 10.1088/1674-1056/26/1/017401

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Quantum critical behavior in an antiferromagnetic heavy-fermion Kondo lattice system (Ce_1-xLa_x)₂Ir₃Ge₅

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, Nanjing 210093, China

收稿日期:2016-08-22 修回日期:2016-09-28 出版日期:2017-01-05 发布日期:2017-01-05
通讯作者: Minghu Fang E-mail:mhfang@zju.edu.cn
基金资助:
Project supported by the National Basic Research Program of China (Grant Nos. 2016FYA0300402, 2015CB921004, and 2012CB821404) and the National Natural Science Foundation of China (Grant Nos. 11374261 and 11204059).

Quantum critical behavior in an antiferromagnetic heavy-fermion Kondo lattice system (Ce_1-xLa_x)₂Ir₃Ge₅

Rajwali Khan¹, Qianhui Mao(毛乾辉)¹, Hangdong Wang(王杭栋)², Jinhu Yang(杨金虎)², Jianhua Du(杜建华)¹, Binjie Xu(许彬杰)¹, Yuxing Zhou(周宇星)¹, Yannan Zhang(张燕楠)¹, Bing Chen(陈斌)², Minghu Fang(方明虎)^1,3

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, Nanjing 210093, China

Received:2016-08-22 Revised:2016-09-28 Online:2017-01-05 Published:2017-01-05
Contact: Minghu Fang E-mail:mhfang@zju.edu.cn
Supported by:
Project supported by the National Basic Research Program of China (Grant Nos. 2016FYA0300402, 2015CB921004, and 2012CB821404) and the National Natural Science Foundation of China (Grant Nos. 11374261 and 11204059).

摘要/Abstract

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-xLa_x)₂Ir₃Ge₅ (0≤x≤0.66) system. It was found that the Neel temperature T_N decreases with increasing La content x, and reaches 0 K near a critical content x_cr=0.6. A new phase diagram was constructed based on these measurements. A non-Fermi liquid behavior in ρ(T) and a logT relationship in C(T) were found in the samples near x_cr, indicating them to be near an AFM quantum critical point (QCP) with strong spin fluctuation. Our finding indicates that (Ce_1-xLa_x)₂Ir₃Ge₅ may be a new platform to search for unconventional superconductivity.

关键词: quantum critical point, antiferromagnetic Kondo lattice system, (Ce_1-xLa_x)₂Ir₃Ge₅

Abstract:

Key words: quantum critical point, antiferromagnetic Kondo lattice system, (Ce_1-xLa_x)₂Ir₃Ge₅

中图分类号: (Quantum critical phenomena)

74.40.Kb

75.50.Ee (Antiferromagnetics) 74.25.F- (Transport properties) 75.20.Hr (Local moment in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions)

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. Quantum critical behavior in an antiferromagnetic heavy-fermion Kondo lattice system (Ce_1-xLa_x)₂Ir₃Ge₅[J]. 中国物理B, 2017, 26(1): 17401-017401.

Rajwali Khan, Qianhui Mao(毛乾辉), Hangdong Wang(王杭栋), Jinhu Yang(杨金虎), Jianhua Du(杜建华), Binjie Xu(许彬杰), Yuxing Zhou(周宇星), Yannan Zhang(张燕楠), Bing Chen(陈斌), Minghu Fang(方明虎). Quantum critical behavior in an antiferromagnetic heavy-fermion Kondo lattice system (Ce_1-xLa_x)₂Ir₃Ge₅[J]. Chin. Phys. B, 2017, 26(1): 17401-017401.

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Quantum critical behavior in an antiferromagnetic heavy-fermion Kondo lattice system (Ce_1-xLa_x)₂Ir₃Ge₅

Quantum critical behavior in an antiferromagnetic heavy-fermion Kondo lattice system (Ce_1-xLa_x)₂Ir₃Ge₅

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