Discovery of conjoined charge density waves in the kagome superconductor CsV3Sb5

Haoxiang Li (), G. Fabbris, A. H. Said, J. P. Sun, Yu-Xiao Jiang, J.-X. Yin (), Yun-Yi Pai, Sangmoon Yoon, Andrew R. Lupini, C. S. Nelson, Q. W. Yin, C. S. Gong, Z. J. Tu, H. C. Lei, J.-G. Cheng, M. Z. Hasan, Ziqiang Wang, Binghai Yan, R. Thomale, H. N. Lee and H. Miao ()
Additional contact information
Haoxiang Li: Oak Ridge National Laboratory
G. Fabbris: Argonne National Laboratory
A. H. Said: Argonne National Laboratory
J. P. Sun: Chinese Academy of Sciences
Yu-Xiao Jiang: Princeton University
J.-X. Yin: Southern University of Science and Technology
Yun-Yi Pai: Oak Ridge National Laboratory
Sangmoon Yoon: Oak Ridge National Laboratory
Andrew R. Lupini: Oak Ridge National Laboratory
C. S. Nelson: Brookhaven National Laboratory
Q. W. Yin: Renmin University of China
C. S. Gong: Renmin University of China
Z. J. Tu: Renmin University of China
H. C. Lei: Renmin University of China
J.-G. Cheng: Chinese Academy of Sciences
M. Z. Hasan: Princeton University
Ziqiang Wang: Boston College
Binghai Yan: Weizmann Institute of Science
R. Thomale: University of Würzburg
H. N. Lee: Oak Ridge National Laboratory
H. Miao: Oak Ridge National Laboratory

Nature Communications, 2022, vol. 13, issue 1, 1-7

Abstract: Abstract The electronic instabilities in CsV3Sb5 are believed to originate from the V 3d-electrons on the kagome plane, however the role of Sb 5p-electrons for 3-dimensional orders is largely unexplored. Here, using resonant tender X-ray scattering and high-pressure X-ray scattering, we report a rare realization of conjoined charge density waves (CDWs) in CsV3Sb5, where a 2 × 2 × 1 CDW in the kagome sublattice and a Sb 5p-electron assisted 2 × 2 × 2 CDW coexist. At ambient pressure, we discover a resonant enhancement on Sb L1-edge (2s→5p) at the 2 × 2 × 2 CDW wavevectors. The resonance, however, is absent at the 2 × 2 × 1 CDW wavevectors. Applying hydrostatic pressure, CDW transition temperatures are separated, where the 2 × 2 × 2 CDW emerges 4 K above the 2 × 2 × 1 CDW at 1 GPa. These observations demonstrate that symmetry-breaking phases in CsV3Sb5 go beyond the minimal framework of kagome electronic bands near van Hove filling.

Date: 2022
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DOI: 10.1038/s41467-022-33995-2

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