Journal Article

PUBDB-2026-00204

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Charge density wave with suppressed long-range structural modulation in canted antiferromagnetic kagome FeGe

Shi, C. ; Hou, W. ; Deng, H. ; Patra, B. ; Kotla, S. R.Extern*UBT* ; Liu, Y. ; Ramakrishnan, S.Extern* ; Eisele, C.Extern* ; AGARWAL, H.Extern* ; Noohinejad, L.Extern*DESY* ; Liu, J.-Y. ; Yang, T.Extern* ; Liu, G. ; Maity, B. B. ; Wang, Q. ; Lin, Z. ; Kang, B. ; Yang, W. ; Li, Y. ; Yang, Z. ; Chen, Y.Extern* ; Li, X. ; Li, Y. ; Qi, Y. ; Thamizhavel, A. ; Ren, W. ; Cao, G.-H. ; Yin, J.-X. ; Singh, B. (Corresponding author) ; Liu, X. (Corresponding author) ; van Smaalen, S. (Corresponding author)Extern* ; Cao, S. (Corresponding author) ; Bao, J. (Corresponding author)Extern*

2025
Springer Nature London

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Please use a persistent id in citations: doi:10.1038/s42005-025-02316-6  doi:10.3204/PUBDB-2026-00204

Abstract: Kagome lattice can host abundant exotic quantum states such as superconductivity and charge density wave (CDW). Recently, successive orders of A-type antiferromagnetism (AFM), CDW and canted AFM have been manifested upon cooling in kagome FeGe. However, the mechanism of CDW and interaction with magnetism remains unclear. Here we investigate the evolution of CDW with temperature across the canted AFM by single-crystal x-ray diffraction, scanning tunneling microscope (STM) and resonant elastic x-ray scattering (REXS). For the samples with longer annealing periods, CDW-induced superlattice reflections become weak after the canted AFM transition, although long-range CDW order is still detectable by STM and REXS. We explore a long-range CDW order with suppressed structural modulation. Additionally, occupational modulations of Ge1 in the kagome plane and displacive modulations of all atoms were extracted. The results confirm Ge dimerization along the c axis and suggest a dynamic transformation between different CDW domains.

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Contributing Institute(s):

1. FS DOOR-User (FS DOOR-User)
2. Experimentebetreuung PETRA III (FS-PET-S)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
3. FS-Proposal: I-20220188 (I-20220188) (I-20220188)
4. DFG project G:(GEPRIS)406658237 - Aperiodische Kristalle: Struktur, Dynamik und elektronische Eigenschaften (406658237) (406658237)

Experiment(s):

1. PETRA Beamline P24 (PETRA III)

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