Coexistence of trihexagonal and star-of-David pattern in the charge density wave of the kagome superconductor <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>A</mml:mi><mml:msub><mml:mi mathvariant="normal">V</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi>Sb</mml:mi><mml:mn>5</mml:mn></mml:msub></mml:mrow></mml:math>

Abstract

Understanding the nature of the exotic CDW order is of crucial importance for uncovering its origin in the kagome superconductors $A$V${}_{3}$Sb${}_{5}$. Here, using angle-resolved photoemission spectroscopy, the authors reveal characteristic double-band splittings and band reconstructions as well as band-folding gaps in the CDW phase. By combining the findings with density functional theory calculations, they demonstrate that two representative distortions in the kagome lattice - the star of David and the trihexagonal ones - intrinsically coexist in the CDW of CsV${}_{3}$Sb${}_{5}$.

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