Low Temperature Properties and Quantum Criticality of CrAs1-xPx single crystal.

We report a systematically study of resistivity and specific heat on phosphorus doped CrAs$_{1-x}$P$_{x}$ single crystals with x$=$0 to 0.2. With the increasing of phosphorus doping concentration x, the magnetic and structural transition temperature T$_{N}$ is suppressed. Non-fermi liquid behavior and quantum criticality phenomenon are observed from low temperature resistivity around critical doping with x$_{c}$ \textasciitilde 0.05 where the long-range antiferromagnetic ordering is completely suppressed. The low temperature specific heat of CrAs$_{1-x}$P$_{x}$ is contributed by the thermal excitation of phonons and electrons. The electronic specific heat coefficient $\gamma $, which reflects the effective mass of quasi-particles, shows maximum around x$_{c}$ \textasciitilde 0.05, also indicating the existence of quantum critical phenomenon around the critical doping. The value of Kadowaki-Woods ratio of CrAs$_{1-x}$P$_{x}$ shows no significant different from that of CrAs. Work is done in collaboration with Fukun Lin, Wei Wu, Ping Zheng, Guozhi Fan, Jinguang Cheng.