kagome磁体FeGe中电荷序及其对应边缘态的发现
强关联电子
2022-11-02 v3
摘要
kagome材料常承载奇异量子相，包括自旋液体、Chern能隙、电荷序与超导。现有的kagome电荷序扫描显微研究仅限于非kagome表面层。本文中我们隧穿进入FeGe的kagome晶格以揭示电荷序的特征。我们的谱学成像在磁性kagome晶格中辨识出2x2电荷序，类似于在kagome超导体中所发现的。跨单位晶胞高度台阶的自旋映射表明，该电荷序源自具有反铁磁堆叠序的自旋极化电子。我们进一步揭示了反铁磁性与电荷序各向异性之间的关联，凸显了电荷序不同寻常的磁耦合。最后，我们在电荷序能隙内探测到显著的边缘态，其对于kagome晶格边缘的不规则形状具有鲁棒性。我们结合理论上考虑的kagome电荷序的拓扑特征（包括轨道磁性与体-边界对应）讨论了我们的结果。
引用
@article{arxiv.2203.01888,
title = {Discovery of charge order and corresponding edge state in kagome magnet FeGe},
author = {Jia-Xin Yin and Yu-Xiao Jiang and Xiaokun Teng and Md. Shafayat Hossain and Sougata Mardanya and Tay-Rong Chang and Zijin Ye and Gang Xu and M. Michael Denner and Titus Neupert and Benjamin Lienhard and Han-Bin Deng and Chandan Setty and Qimiao Si and Guoqing Chang and Zurab Guguchia and Bin Gao and Nana Shumiya and Qi Zhang and Tyler A. Cochran and Daniel Multer and Ming Yi and Pengcheng Dai and M. Zahid Hasan},
journal= {arXiv preprint arXiv:2203.01888},
year = {2022}
}