2026-01-15 東京大学,北海道大学
原子間力顕微鏡によって酸素分子の磁気構造を観察するイメージ図
＜関連情報＞
- https://www.k.u-tokyo.ac.jp/information/category/press/0028995.html
- https://www.k.u-tokyo.ac.jp/assets/files/酸素分子の「スピン」が引き起こす分子配列の歪みを可視化_WEB.pdf
- https://pubs.acs.org/doi/10.1021/acsnano.5c11357
原子間力顕微鏡による酸素原子膜のスピン誘起格子歪みの実空間観察 Real-Space Observation of Spin-Induced Lattice Distortion of O2 Monolayers Revealed by Atomic Force Microscopy
Mitsuo Kimura,Yuji Kunisada,and Yoshiaki Sugimoto
ACS Nano Published: January 14, 2026
DOI:https://doi.org/10.1021/acsnano.5c11357
Abstract
The monolayer formed by the adsorption of oxygen (O2) molecules onto the substrate constitutes a two-dimensional spin system. Real-space imaging of the magnetic structures poses a challenge due to weak molecular interactions and the insulating character of the system. Here, we achieved noninvasive atomic-scale observation of monolayers of O2 molecules weakly adsorbed on Ag(111) substrates using atomic force microscopy. This technique enables the real-space observation of spin-induced lattice distortions. Density functional theory calculations, incorporating dispersion interactions, and Monte Carlo simulation, reveal that the spin reduction of O2 molecules on the substrate quantitatively explains the lattice shape both in the interior and at the boundaries of the domain. The precise measurement of lattice distortion enables the determination of the local magnetic structures.
