Study of the Ce compound which exhibits pressure-induced superconductivity, magneto resistance and unisotropic kondo scattering

本研究测量了CePtSi2单晶及其相关材料在压力和磁场下的输运性质，揭示了CePtSi2中压力诱导超导性、大磁阻和各向异性近藤散射的来源。主要结果如下所示。(1)各晶轴在压力下的输运特性表明，CePtSi2中压力诱导的超导性是由价涨落的影响介导的。(2) c轴磁阻效应大，b轴磁阻效应小。这表明各向异性磁阻与近藤散射具有相同的起源。

In this study, the transport properties of single crystals of CePtSi2 and its relative materials under pressure and in magnetic fields were measured to reveal the origin of the pressure-induced superconductivity, large magnetoresitance, and anisotropic Kondo scattering in CePtSi2. The main results are shown below. (1) The transport properties under pressure for each crystal axis indicated that the pressure-induced superconductivity in CePtSi2 is mediated by the influence of valence fluctuation.(2) The magnetoresistance effect is large for c-axis, but very small for b-axis. This suggests that the anisotropic magnetoresistance and Kondo scattering have the same origin.