氧化物/氮化物界面的室温铁磁性
材料科学
2022-01-19 v1
摘要
异质界面因其强烈纠缠的电子自由度而导致了新颖电子与磁态的发现。单相铬化合物依据 Goodenough-Kanamori 规则的预言总是呈现反铁磁性。迄今,铬离子经由异质阴离子间的交换耦合尚未被探索,其关联的量子态亦未知。本文报道了铬氧化物(Cr2O3)-铬氮化物(CrN)超晶格的外延合成与表征。在这两个反铁磁体之间的界面上实现了室温铁磁自旋有序,且效应大小随层厚增加而衰减。第一性原理计算表明,跨界面的 Cr3+ 离子经由阴离子杂化产生的稳健铁磁自旋相互作用使总能量最低。本工作为理解氧化物-氮化物界面出乎意料的特殊性质打开了大门,并提供了通向低维量子异质结构中隐藏相的途径。
引用
@article{arxiv.2111.13278,
title = {Room-temperature ferromagnetism at an oxide/nitride interface},
author = {Qiao Jin and Zhiwen Wang and Qinghua Zhang and Yonghong Yu and Shan Lin and Shengru Chen and Mingqun Qi and He Bai and Qian Li and Le Wang and Xinmao Yin and Chi Sin Tang and Andrew T. S. Wee and Fanqi Meng and Jiali Zhao and Jia-Ou Wang and Haizhong Guo and Chen Ge and Can Wang and Wensheng Yan and Tao Zhu and Lin Gu and Scott A. Chambers and Sujit Das and Gang-Qin Liu and Shanmin Wang and Kui-juan Jin and Hongxin Yang and Er-Jia Guo},
journal= {arXiv preprint arXiv:2111.13278},
year = {2022}
}
备注
21 pages, 4 figures