Multi-Component Electronic Correlations in Non-Centrosymmetric f-Electron Compounds

在金属f电子化合物中，电子相关的影响是特别明显的，驱动传统和非传统形式的自旋和电荷顺序。尽管对重费米子材料进行了数十年的深入研究，但一个重要的未解决的问题是，强相关效应在多大程度上反映了几乎等效能量尺度的相互作用，如磁相互作用、自旋和晶格各向异性、晶体电场磁弹性耦合等。最近对非中心对称f电子化合物的研究表明，声子、晶体场激发和磁振子的耦合稳定了新形式的杂化激发、非常规超导和复杂形式的磁序。我们建议结合高质量单晶的制备、极端条件下的体积和输运测量、全面的中子散射研究和量子振荡测量，对精心选择的非中心对称f电子化合物中的电子相关性质进行详细的现象学描述。我们建议将我们的研究重点放在同构CeTAl3和CeTGa3化合物（其中T代表过渡金属）的类别上，以及选择用于暴露非常规行为的互补系统。

In metallic f-electron compounds the effects of electronic correlations are exceptionally pronounced, driving conventional and unconventional forms of spin and charge order. Despite many decades of intense research in heavy fermion materials, an important unresolved question concerns to what extent the effects of strong correlations reflect the interplay of nearly equivalent energy scales such as magnetic interactions, spin and lattice anisotropies, crystal electric fields magneto-elastic coupling etc. Recent studies in non-centrosymmetric f-electron compounds reveal, that the coupling of phonons, crystal field excitations and magnons stabilise new forms of hybrid excitations, unconventional superconductivity and complex forms of magnetic order. We propose to develop a detailed phenomenological account of the nature of electronic correlations in carefully selected non-centrosymmetric f-electron compounds, combining the preparation of high quality single-crystals, bulk and transport measurements under extreme conditions, comprehensive neutron scattering studies and measurements of quantum oscillations. We propose to focus in our studies on the class of isostructural CeTAl3 and CeTGa3 compounds (where T stands for a transition metal), as well as complimentary systems selected to expose unconventional behaviour.