Discovery of conjoined charge density waves in the kagome superconductor CsV3Sb5

Li, Haoxiang; Fabbris, G.; Said, A. H.; Sun, J. P.; Jiang, Yu-Xiao; Yin, J. -X.; Pai, Yun-Yi; Yoon, Sangmoon; Lupini, Andrew R.; Nelson, C. S.; Yin, Q. W.; Gong, C. S.; Tu, Z. J.; Lei, H. C.; Cheng, J. -G.; Hasan, M. Z.; Wang, Ziqiang; Yan, Binghai; Thomale, R.; Lee, H. N.; Miao, H.

doi:10.1038/s41467-022-33995-2

Discovery of conjoined charge density waves in the kagome superconductor CsV3Sb5

Journal Article · Wed Oct 26 00:00:00 EDT 2022 · Nature Communications

DOI:https://doi.org/10.1038/s41467-022-33995-2· OSTI ID:1894711

; ; Said, A. H.; ; Jiang, Yu-Xiao; ; ; Yoon, Sangmoon; ; ; Yin, Q. W.; Gong, C. S.; Tu, Z. J.; ; ; ; ; ; ; more »

Abstract

The electronic instabilities in CsV ₃ Sb ₅ are believed to originate from the V 3 d -electrons on the kagome plane, however the role of Sb 5 p -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 CsV ₃ Sb ₅ , where a 2 × 2 × 1 CDW in the kagome sublattice and a Sb 5 p -electron assisted 2 × 2 × 2 CDW coexist. At ambient pressure, we discover a resonant enhancement on Sb L ₁ -edge (2 s →5 p ) 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 CsV ₃ Sb ₅ go beyond the minimal framework of kagome electronic bands near van Hove filling.

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Sponsoring Organization:: USDOE

OSTI ID:: 1894711

Alternate ID(s):: OSTI ID: 2382746
OSTI ID: 1895205
OSTI ID: 1922807

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 13; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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