Pressure Effect of Transport Properties of Hexagonal Yb2Ni12P7
Pressure Effect of Transport Properties of Hexagonal Yb2Ni12P7
复制标题
压力对六方晶系Yb2Ni12P7输运性能的影响
DOI：
10.1088/1742-6596/391/1/012052
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
T. Nakano
中科院分区：
文献类型：
--
作者：
Y. Akagi;M. Udagawa and Y. Motome;T. Nakano
采用Sn-flux法制备了Yb{sub 2}Ni{sub 12}P{sub 7}单晶，并测量了其在高达8 GPa静水压力下的电阻率。在环境压力下，电阻率{rho}{sub mag}(T)的磁性部分在T{sub max}{约}100 K附近出现峰值，在费米液体的特征温度T{sub FL} = 3 K以下与T{sup 2}相关。当压力增大到2.06 GPa时，在T{sub max}以上的{rho}{sub mag}(T)值略有减小，而在T{sub max}以下的{rho}{sub mag}值略有增大。T{sub FL}随着压力的增加而降低，预计在2.5 GPa时变为零。在此压力附近，{rho}{sub mag}中的T{sup 2}系数显著增大，表明存在量子临界点。在2.5 GPa以上，总体{rho}{sub mag}随着压力的增加逐渐减小，直至6 GPa，但在15.5 K以下，{rho}{sub mag}在6 GPa以上增加。
We prepared single crystals of Yb{sub 2}Ni{sub 12}P{sub 7} using a Sn-flux method and measured their resistivity under hydrostatic pressure up to 8 GPa. At ambient pressure, the magnetic part of resistivity {rho}{sub mag}(T) shows a peak around T{sub max} {approx} 100 K and T{sup 2} dependence below the characteristic temperature of the Fermi liquid, T{sub FL} = 3 K. When pressure increases up to 2.06 GPa, the value {rho}{sub mag}(T) above T{sub max} decreases slightly but {rho}{sub mag} below T{sub max} increases slightly. T{sub FL} decreases with increasing pressure, and is expected to become zero at 2.5 GPa. Around this pressure, the coefficient of T{sup 2} in {rho}{sub mag} significantly increases, suggesting the existence of a quantum critical point. Above 2.5 GPa, overall {rho}{sub mag} gradually decreases with increasing pressure up to 6 GPa, but it below 15.5 K increases above 6 GPa.