Zero-field quantum critical point in Ce0.91Yb0.09CoIn5
Zero-field quantum critical point in Ce0.91Yb0.09CoIn5
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Ce0.91Yb0.09CoIn5 中的零场量子临界点
DOI：
10.1103/physrevb.97.184514
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发表时间：
2018
影响因子：
3.7
通讯作者：
Almasan, C. C.
中科院分区：
文献类型：
--
作者：
Singh, Y. P.;Adhikari, R. B.;Haney, D. J.;White, B. D.;Maple, M. B.;Dzero, M.;Almasan, C. C.
我们目前的比热，电阻和磁阻测量重费米子超导合金单晶的结果。在索末菲系数和电阻率数据的温度依赖性中清楚地观察到非费米液体到费米液体的交叉。此外，我们还利用的标度分析表明，在没有外加磁场的情况下，Yb掺杂样品由于潜在的量子相变而具有普适性。根据现有的理论模型拟合的热容和电阻率数据表明，零场量子临界点是反铁磁起源。最后，我们发现在零磁场下，系统在温度K下发生三级相变。
We present results of specific heat, electrical resistance, and magnetoresistivity measurements on single crystals of the heavy-fermion superconducting alloy. Non-Fermi-liquid to Fermi-liquid crossovers are clearly observed in the temperature dependence of the Sommerfeld coefficientand resistivity data. Furthermore, we show that the Yb-doped sample withexhibits universality due to an underlying quantum phase transition without an applied magnetic field by utilizing the scaling analysis of. Fitting of the heat capacity and resistivity data based on existing theoretical models indicates that the zero-field quantum critical point is of antiferromagnetic origin. Finally, we found that at zero magnetic field the system undergoes a third-order phase transition at the temperatureK.