Emergence of Kondo-assisted N´eel order in a Kondo necklace model
ORAL
Abstract
Based on our material-design platform using organic radicals, we have explored unprecedented quantum phenomena that have never been reported before.
We report our recent progress on Kondo necklace systems as an example of our exploration of quantum phenomana. The Kondo necklace model, proposed by Doniach in 1977, is a one-dimensional theoretical model that simplifies the Kondo lattice by focusing solely on the spin degrees of freedom of electrons. It has attracted great interest as a key quantum model for investigating the emergence of new quantum phases and the possibility of band-structure control. However, despite its conceptual simplicity, the realization of this model has long been hindered by the incompatibility with the symmetry and structural stability of inorganic compounds.
In this work, we have successfully realized a Kondo necklace system by designing the molecular stacking structure of our original radical-based complexes [1]. Moreover, we synthesized a Ni-based complex forming a spin-(1/2, 1) system, and demonstrated that the Kondo coupling can enhance magnetic ordering. This was verified through an analysis of the quantum state based on conformal field theory.
[1]H. Yamaguchi et al., Phys. Rev. Res. 7, L012023 (2025)
We report our recent progress on Kondo necklace systems as an example of our exploration of quantum phenomana. The Kondo necklace model, proposed by Doniach in 1977, is a one-dimensional theoretical model that simplifies the Kondo lattice by focusing solely on the spin degrees of freedom of electrons. It has attracted great interest as a key quantum model for investigating the emergence of new quantum phases and the possibility of band-structure control. However, despite its conceptual simplicity, the realization of this model has long been hindered by the incompatibility with the symmetry and structural stability of inorganic compounds.
In this work, we have successfully realized a Kondo necklace system by designing the molecular stacking structure of our original radical-based complexes [1]. Moreover, we synthesized a Ni-based complex forming a spin-(1/2, 1) system, and demonstrated that the Kondo coupling can enhance magnetic ordering. This was verified through an analysis of the quantum state based on conformal field theory.
[1]H. Yamaguchi et al., Phys. Rev. Res. 7, L012023 (2025)
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Presenters
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Hironori Yamaguchi
- Osaka Metropolitan University