Tuning the Heavy Fermion State of CeFeGe$_{3}$ by Ru Doping
Xin-Bei Xia1, Bin Shen1, Michael Smidman1, Ye Chen1, Hanoh Lee1,2, Hui-Qiu Yuan1,3**
1Center for Correlated Matter and Department of Physics, Zhejiang University, Hangzhou 310058 2Department of Physics, Sungkyunkwan University, Suwon 440-746, South Korea 3Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093
Abstract：We successfully synthesize a series of polycrystalline CeRu$_{x}$Fe$_{1-x}$Ge$_{3}$ ($0\leq x\leq 0.5$) samples, which are characterized using powder x-ray diffraction, resistivity and specific heat measurements. The expansion of the lattice constants with increasing $x$ demonstrates the successful doping of Ru into the CeFeGe$_{3}$ lattice. Upon doping, it is found that the temperature up to which Landau–Fermi liquid behavior is observed in the resistivity is reduced. Meanwhile, there is also a pronounced increase in the resistivity coefficient and residual resistivity, as well as a clear upturn in $C/T$ at low temperatures, suggesting that Ru doping may tune the system towards a quantum critical point.
(Critical-point effects, specific heats, short-range order)
引用本文:
. [J]. 中国物理快报, 2018, 35(6): 67102-.
Xin-Bei Xia, Bin Shen, Michael Smidman, Ye Chen, Hanoh Lee, Hui-Qiu Yuan. Tuning the Heavy Fermion State of CeFeGe$_{3}$ by Ru Doping. Chin. Phys. Lett., 2018, 35(6): 67102-.
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2018, Vol. 35 
