Non-degenerate surface pair density wave in the Kagome superconductor CsV${}_3$Sb${}_5$ -- application to vestigial orders

Abstract

On the Sb-layer of the Kagome superconductor CsV${}_3$Sb${}_5$, pair density wave states have been observed. When the high-temperature charge orderings are treated as static backgrounds, these PDW states exhibit the same wavevector in the effective 2D Brillouin zone. Interestingly, these PDW states break the same symmetry on the surface. Considering the presence of this non-degenerate PDW, we investigate the implications for the possible existence of a vestigial charge-4e phase with a non-zero center-of-mass momentum. To distinguish between different vestigial phases, we propose scanning tunneling microscopy experiments. We aim to provide insights into the nature of the vestigial phases and their distinct characteristics in CsV${}_3$Sb${}_5$. This research sheds light on the interplay between PDW states, charge orderings, and superconductivity of the Kagome superconductor.

References in corpus (24)

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• Microscopic evidence for anisotropic multigap superconductivity in the CsV${}_3$Sb${}_5$ kagome superconductor
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Cited by in corpus (5)

• Charge 4e superconductivity and chiral metal in the $45^{\circ }$-twisted bilayer cuprates and similar bilayers
• Nematic Superconductivity and Its Critical Vestigial Phases in the Quasi-crystal
• Frustrated superconductivity and sextetting order
• Cooper quartets in interacting hybrid superconducting systems
• Local condensation of charge-$4e$ superconductivity at a nematic domain wall