Guehne Robin, Noky Jonathan, Yi Changjiang, Shekhar Chandra, Vergniory Maia G, Baenitz Michael, Felser Claudia
Max Planck Institute for Chemical Physics of Solids, 01187, Dresden, Germany.
Donostia International Physics Center, 20018, Donostia - San Sebastian, Spain.
Nat Commun. 2024 Sep 18;15(1):8213. doi: 10.1038/s41467-024-52456-6.
The kagome network is a unique platform that harbors a diversity of special electronic states due to its inherent band structure features comprising Dirac cones, van Hove singularities, and flat bands. Some kagome-based metals have recently been found to exhibit favorable properties, including superconductivity, charge order, and signatures of an anomalous Hall effect. The kagome system ScVSn is a promising candidate for studying the emergence of an unconventional charge order and accompanying effects. We use V nuclear magnetic resonance to explore the local properties of the charge ordered phase in single crystalline ScVSn, aided by density functional theory. We show the local charge symmetry of V to reflect a commensurate modulation with , the density of states to drop by about a factor of during the phase transition, and an unusual orientation dependent change in the shift splitting symmetry to reveal orbital selective modulations of the local density of states.
Kagome网络是一个独特的平台，由于其固有的能带结构特征，包括狄拉克锥、范霍夫奇点和平带，它拥有多种特殊的电子态。最近发现一些基于Kagome的金属表现出良好的性质，包括超导性、电荷序和反常霍尔效应的特征。Kagome体系ScVSn是研究非常规电荷序的出现及伴随效应的一个有前途的候选材料。我们利用钒核磁共振来探索单晶ScVSn中电荷有序相的局部性质，并借助密度泛函理论进行辅助研究。我们表明，钒的局部电荷对称性反映了与……的相称调制，态密度在相变过程中下降约一个因子，并且位移分裂对称性中出现不寻常的取向依赖性变化，以揭示局部态密度的轨道选择性调制。
