Quantum critical scaling in the quasi-1D heavy fermion CeCo2Ga8
Study of quantum critical point (QCP), which T=0 K quantm phase transition, is a great challenge in strong correlated materials, since it only emerges at zero temperature by tuning parameters like pressure, magnetic filed or chemical dopings. Many Ce- and Yb-based systems exhibit QCP and non-Fermi-liquid (NFL) behaviour. Theses systems are mainly 2D or 3D. There are not many examples for 1D systems exhibiting QCP and NFL behaviour without chemical doping/disordered, which creates disordered induced NFL and theoretical interpretation of QCP becomes more difficult. Very recently quasi-1D Kondo lattice system CeCo2Ga8 has been reported to exhibits NFL and QCP behavior without doping (also without disordered) and at ambient pressure. We therefore propose here to measure the energy and temperature dependence of spin excitations in single crystals of CeCo2Ga8 using the high neutron flux spectrometer IN5 to examine the quantum critical scaling (i.e. /T-scaling) behavior of the dynamical susceptibility. The present system is a model system to investigate both experimentally and theoretical to find out how the value of the critical exponent will change with the dimensionality. 
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D.T. Adroja; Amitava Bhattacharyya; KOZA Michael Marek; LIU Chang; Huiqian Luo and Xingyu Wang. (2019). Quantum critical scaling in the quasi-1D heavy fermion CeCo2Ga8. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-03-1734
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