• Accepted Paper

Scanning tunneling microscopy study of the charge order landscape in CsCr3Sb5

Jiakang Zhang, Xiangqi Liu, Shiyuan Wang, Ziyuan Chen, Zhiyuan Ma, Yuanji Li, Ruotong Yin, Jiashuo Gong, Mingzhe Li, Xiuhua Chen, Yanfeng Guo, Yilin Wang, Dong-Lai Feng, and Ya-Jun Yan

Phys. Rev. B - Accepted 18 September, 2026

DOI: https://doi.org/10.1103/x4xb-hrjh

Abstract

Recently, a chromium-based Kagome metal CsCr3Sb5 has attracted significant attention due to the coexistence of density-wave-like (DW-like) orders and unconventional superconductivity; however, the nature of the DW-like orders remains elusive. Here, we perform scanning tunneling microscopy and spectroscopy (STM/STS) study on multiple CsCr3Sb5 crystals and identify a robust 4×√3 charge order (CO) on the Sb2-terminated surface, alongside other region-dependent charge modulations. Through comparative analysis and structural simulations, we attribute the 4×√3 CO to the coherent superposition of the underlying Sb lattice, a 2×√3 charge stripe, and additional fine structural distortions. Our DFT calculations on bulk CsCr3Sb5 suggest that among the considered spin density wave (SDW) configurations, a 2×√3 SDW has the lowest energy, which will induce a 2×√3 charge modulation. This provides a possible bulk-derived scenario for the 2×√3 CO component. The possible factors influencing the region-dependent charge modulations are also discussed. Our study provides a microscopic picture for the abundant COs in CsCr3Sb5 and highlights the propensity of magnetic Kagome metals to host multiple, nearly degenerate, and competing electronic orders.

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