Imaging real-space flat band localization in kagome magnet FeSn

Multer，Daniel1; Yin，Jia Xin2; Hossain，Md Shafayat1; Yang，Xian1; Sales，Brian C.3; Miao，Hu3; Meier，William R.4; Jiang，Yu Xiao1; Xie，Yaofeng5; Dai，Pengcheng5; Liu，Jianpeng6; Deng，Hanbin2; Lei，Hechang7; Lian，Biao1; Zahid Hasan，M.1,8,9,10

2023-12-01

10.1038/s43246-022-00328-1

Communications Materials   Impact Factor & Quartile

2662-4443

Kagome lattices host flat bands due to their frustrated lattice geometry, which leads to destructive quantum interference of electron wave functions. Here, we report imaging of the kagome flat band localization in real-space using scanning tunneling microscopy. We identify both the FeSn kagome lattice layer and the Sn honeycomb layer with atomic resolution in kagome antiferromagnet FeSn. On the FeSn lattice, at the flat band energy determined by the angle resolved photoemission spectroscopy, tunneling spectroscopy detects an unusual state localized uniquely at the Fe kagome lattice network. We further show that the vectorial in-plane magnetic field manipulates the spatial anisotropy of the localization state within each kagome unit cell. Our results are consistent with the real-space flat band localization in the magnetic kagome lattice. We further discuss the magnetic tuning of flat band localization under the spin–orbit coupled magnetic kagome lattice model.

English

Others

2-s2.0-85148686250

Scopus

1.Department of Physics,Princeton University,Princeton,08544,United States
2.Department of Physics,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
3.Materials Science and Technology Division,Oak Ridge National Laboratory,Oak Ridge,37830,United States
4.Materials Science & Engineering Department,University of Tennessee Knoxville,Knoxville,37921,United States
5.Department of Physics and Astronomy,Rice Center for Quantum Materials,Rice University,Houston,77005,United States
6.School of Physical Science and Technology,ShanghaiTech University,Shanghai,201210,China
7.Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices,Renmin University of China,Beijing,100086,China
8.Lawrence Berkeley National Laboratory,Berkeley,94720,United States
9.Princeton Institute for the Science and Technology of Materials,Princeton University,Princeton,08544,United States
10.Quantum Science Center,Oak Ridge,37830,United States

Multer，Daniel,Yin，Jia Xin,Hossain，Md Shafayat,et al. Imaging real-space flat band localization in kagome magnet FeSn[J]. Communications Materials,2023,4(1).

Multer，Daniel.,Yin，Jia Xin.,Hossain，Md Shafayat.,Yang，Xian.,Sales，Brian C..,...&Zahid Hasan，M..(2023).Imaging real-space flat band localization in kagome magnet FeSn.Communications Materials,4(1).

Multer，Daniel,et al."Imaging real-space flat band localization in kagome magnet FeSn".Communications Materials 4.1(2023).