Heterodimensional Kondo superlattices with strong anisotropy

• Published in: Nature communications 2024-06, Vol.15 (1), p.5491-7, Article 5491
• Main Authors: Feng, Qi, Duan, Junxi, Wang, Ping, Jiang, Wei, Peng, Huimin, Zhong, Jinrui, Cao, Jin, Hu, Yuqing, Li, Qiuli, Wang, Qinsheng, Zhou, Jiadong, Yao, Yugui
• Format: Article
• Language: English
• Subjects: 639/766/119/995; 639/925/357/1018; Humanities and Social Sciences; multidisciplinary; Science; Science (multidisciplinary)
• ISSN: 2041-1723; 2041-1723
• DOI: 10.1038/s41467-024-49618-x

Localized magnetic moments in non-magnetic materials, by interacting with the itinerary electrons, can profoundly change the metallic properties, developing various correlated phenomena such as the Kondo effect, heavy fermion, and unconventional superconductivity. In most Kondo systems, the localized moments are introduced through magnetic impurities. However, the intrinsic magnetic properties of materials can also be modulated by the dimensionality. Here, we report the observation of Kondo effect in a heterodimensional superlattice VS 2 -VS, in which arrays of the one-dimensional (1D) VS chains are encapsulated by two-dimensional VS 2 layers. In such a heterodimensional Kondo superlattice, we observe the typical Kondo effect but with intriguing anisotropic field dependence. This unique anisotropy is determined to originate from the magnetic anisotropy which has the root in the unique 1D chains in the structure, as corroborated by the first-principles calculation. Our results open up a novel avenue of studying exotic correlated physics in heterodimensional materials. The Kondo effect has been observed in transition metal dichalcogenides, where it typically stems from magnetic impurities. Here the authors report the Kondo effect in a heterodimensional superlattice VS 2 -VS, where dimensionality effects on intrinsic magnetic properties play a major role.