TY - JOUR
T1 - Vacancy-induced suppression of charge density wave order and its impact on magnetic order in kagome antiferromagnet FeGe
AU - Klemm, Mason L.
AU - Siddique, Saif
AU - Chang, Yuan Chun
AU - Xu, Sijie
AU - Xie, Yaofeng
AU - Legvold, Tanner
AU - Kiani, Mehrdad T.
AU - Teng, Xiaokun
AU - Gao, Bin
AU - Ye, Feng
AU - Cao, Huibo
AU - Hao, Yiqing
AU - Tian, Wei
AU - Luetkens, Hubertus
AU - Matsuda, Masaaki
AU - Natelson, Douglas
AU - Guguchia, Zurab
AU - Huang, Chien Lung
AU - Yi, Ming
AU - Cha, Judy J.
AU - Dai, Pengcheng
N1 - Publisher Copyright:
© The Author(s) 2025.
PY - 2025/12
Y1 - 2025/12
N2 - Two-dimensional (2D) kagome lattice metals are interesting because their corner sharing triangle structure enables a wide array of electronic and magnetic phenomena. Recently, post-growth annealing is shown to both suppress charge density wave (CDW) order and establish long-range CDW with the ability to cycle between states repeatedly in the kagome antiferromagnet FeGe. Here we perform transport, neutron scattering, scanning transmission electron microscopy (STEM), and muon spin rotation (μSR) experiments to unveil the microscopic mechanism of the annealing process and its impact on magneto-transport, CDW, and magnetism in FeGe. Annealing at 560 °C creates uniformly distributed Ge vacancies, preventing the formation of Ge-Ge dimers and thus CDW, while 320 °C annealing concentrates vacancies into stoichiometric FeGe regions with long-range CDW. The presence of CDW order greatly affects the anomalous Hall effect, incommensurate magnetic order, and spin-lattice coupling in FeGe, placing FeGe as the only kagome lattice material with tunable CDW and magnetic order.
AB - Two-dimensional (2D) kagome lattice metals are interesting because their corner sharing triangle structure enables a wide array of electronic and magnetic phenomena. Recently, post-growth annealing is shown to both suppress charge density wave (CDW) order and establish long-range CDW with the ability to cycle between states repeatedly in the kagome antiferromagnet FeGe. Here we perform transport, neutron scattering, scanning transmission electron microscopy (STEM), and muon spin rotation (μSR) experiments to unveil the microscopic mechanism of the annealing process and its impact on magneto-transport, CDW, and magnetism in FeGe. Annealing at 560 °C creates uniformly distributed Ge vacancies, preventing the formation of Ge-Ge dimers and thus CDW, while 320 °C annealing concentrates vacancies into stoichiometric FeGe regions with long-range CDW. The presence of CDW order greatly affects the anomalous Hall effect, incommensurate magnetic order, and spin-lattice coupling in FeGe, placing FeGe as the only kagome lattice material with tunable CDW and magnetic order.
UR - https://www.scopus.com/pages/publications/105002963898
UR - https://www.scopus.com/pages/publications/105002963898#tab=citedBy
U2 - 10.1038/s41467-025-58583-y
DO - 10.1038/s41467-025-58583-y
M3 - Article
C2 - 40195319
AN - SCOPUS:105002963898
SN - 2041-1723
VL - 16
JO - Nature communications
JF - Nature communications
IS - 1
M1 - 3313
ER -