Quantum spin excitations in a dual-core magnetic molecule
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866912370507382784 |
|---|---|
| author | Li, Wenbin Shi, Wenwen Xiao, Xiaoxiao Zhu, Haiyan Cheng, Cai Wang, Dongfei Chen, Lan Haze, Masahiro Fu, Huixia Zheng, Xiao Guo, Yang Li, Zhendong Hasegawa, Yukio |
| author_facet | Li, Wenbin Shi, Wenwen Xiao, Xiaoxiao Zhu, Haiyan Cheng, Cai Wang, Dongfei Chen, Lan Haze, Masahiro Fu, Huixia Zheng, Xiao Guo, Yang Li, Zhendong Hasegawa, Yukio |
| contents | Magnetic excitations are important quantum phenomena in magnetic systems and have been widely studied in individual magnetic atoms and molecules as well as their assembled structures over the past few decades. Using scanning tunneling microscopy/spectroscopy (STM/S) combined with density functional theory (DFT) and the state-of-the-art ab initio wavefunction calculations, we investigated the properties of a novel dual-core Cr2Br6 molecule, which consists of two Cr ions coupled via superexchange through a single near-90° Cr-Br-Cr scissors bond. Under zero magnetic field, we observed a Fano peak with multi-steps through STS. When an external magnetic field is applied, some steps exhibit additional splitting, while others change little. We find that the Cr2Br6, exhibits a spin-degenerate ground state, and the complex peak splitting arises from the coexistence of vibrational and magnetic excitations in the molecule. Our results reveal rich quantum spin behavior in a well-defined two-core magnetic trihalide complex at the atomic scale, offering not only a minimal model for superexchange-coupled multi-spin quantum excitations but also a possible foundational unit for future molecule-based quantum functionalities. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_07204 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quantum spin excitations in a dual-core magnetic molecule Li, Wenbin Shi, Wenwen Xiao, Xiaoxiao Zhu, Haiyan Cheng, Cai Wang, Dongfei Chen, Lan Haze, Masahiro Fu, Huixia Zheng, Xiao Guo, Yang Li, Zhendong Hasegawa, Yukio Materials Science Atomic and Molecular Clusters Magnetic excitations are important quantum phenomena in magnetic systems and have been widely studied in individual magnetic atoms and molecules as well as their assembled structures over the past few decades. Using scanning tunneling microscopy/spectroscopy (STM/S) combined with density functional theory (DFT) and the state-of-the-art ab initio wavefunction calculations, we investigated the properties of a novel dual-core Cr2Br6 molecule, which consists of two Cr ions coupled via superexchange through a single near-90° Cr-Br-Cr scissors bond. Under zero magnetic field, we observed a Fano peak with multi-steps through STS. When an external magnetic field is applied, some steps exhibit additional splitting, while others change little. We find that the Cr2Br6, exhibits a spin-degenerate ground state, and the complex peak splitting arises from the coexistence of vibrational and magnetic excitations in the molecule. Our results reveal rich quantum spin behavior in a well-defined two-core magnetic trihalide complex at the atomic scale, offering not only a minimal model for superexchange-coupled multi-spin quantum excitations but also a possible foundational unit for future molecule-based quantum functionalities. |
| title | Quantum spin excitations in a dual-core magnetic molecule |
| topic | Materials Science Atomic and Molecular Clusters |
| url | https://arxiv.org/abs/2505.07204 |