Dynamics of high rank multipoles in strongly correlated electron systems with high symmetry

本研究的目的主要是通过中子散射实验来阐明强关联高对称性电子系统中与f电子多极性有关的物理性质。我曾尝试在极低温度下对（Ce，La）B^6进行非弹性中子散射实验，这是一个典型的多极有序系统。然而，由于冷却样品的技术问题，到目前为止他们还没有成功，但是，我可以得到关于该系统顺磁相中4f电子动力学性质的初步数据。另一方面，在典型的强关联5f电子系统U（Ru，Rh）^2Si^2中，它被认为与5f电子的多极性有关，神秘的场致相的磁结构是通过高场中子衍射确定的。

The purpose of this research is to clarify the physical properties related to multipoles of f electrons in strongly correlated electron systems with high symmetry mainly by neutron scattering experiments. I have tried to do inelastic neutron scattering experiments at very low temperatures on (Ce,La)B^6 which is a typical system showing multipole order. However they have not been successful so far unfortunately because of technical troubles of cooling the sample, but, I could get the preliminary data about the dynamical properties of 4f electrons in the paramagnetic phase of this system. In the typical strongly correlated 5f electron system U(Ru,Rh)^2Si^2 which is considered to be related to multipoles of 5f electrons, on the other hand, the magnetic structure of the mysterious field-induced phase was determined by high-field neutron diffraction.