论文标题
ce_xla_ {1-x} cu_ {5.62} au_ {0.38}（x = 0.02-0.10）的非FERMI液体温度依赖性的理论
Theory for Non-Fermi Liquid Temperature Dependence in Resistivity of Ce_xLa_{1-x} Cu_{5.62} Au_{0.38} (x=0.02-0.10) on the Local Quantum Valence Criticality of Ce Impurities
论文作者
论文摘要
Shiino等人在J. Phys中报道了它。 Soc。 JPN。 86，123705（2017）ce_xla_ {1-x} cu_ {5.62} au_ {0.38}（x = 0.02-0.10）在磁性和热属性中表现出一种新型的量子关键性，与一系列材料相同的量子和热的量子（如量子标准）的量子范围（QC）（QCV）相同。 yb_ {15} al_ {34} au_ {51}，依此类推。但是，t <0.5k的电阻率RHO（t）的温度（t）依赖性是非常异常的，即，ρ（t）\ propto（const.-t^{n}），x = 0.05，n \ simeq 0.75。我们发现，这种异常指数由n = 2（1-ζ）给出，Zeta是QCVF的弱温度依赖性（0.5 \lsimζ\ lsim 0.7）的关键指数。观察到的关键指数N \ Simeq 0.75在x = 0.05时通过选择ectect cantive cantive canterints x = 0.05是一致的效果。在x = 0.02时，具有ζ\ simeq 0.67的敏感性χ\ propto t^{ - ζ}。
It was reported by Shiino et al in J. Phys. Soc. Jpn. 86, 123705 (2017) that Ce_xLa_{1-x} Cu_{5.62} Au_{0.38} (x=0.02-0.10) exhibits a new type of quantum criticality in both magnetic and thermal properties, which is the same as that observed in a series of materials exhibiting quantum critical valence fluctuations (QCVF), such as β-YbAlB_4, Yb_{15}Al_{34}Au_{51}, and so on. However, the temperature (T) dependence in the resistivity rho(T) for T<0.5K is quite anomalous, i.e., ρ(T)\propto (const.-T^{n}) with n \simeq 0.75 at x=0.05. We find that this anomalous exponent is given by n=2(1-ζ), with zeta being the weakly temperature dependent (0.5 \lsim ζ\lsim 0.7) critical exponent for the QCVF.The observed critical exponent n\simeq 0.75 at x=0.05 is reproduced by choosing ζ\simeq 0.63 which is consistent with the divergent behavior observed in the uniform magnetic susceptibility χ\propto T^{-ζ} with ζ\simeq 0.67 at x=0.02.
