$Three-Dimensional Charge Density Wave and Surface-Dependent Vortex-Core States in a Kagome Superconductor CsV_{3}Sb_{5}$
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Three-Dimensional Charge Density Wave and Surface-Dependent Vortex-Core States in a Kagome Superconductor CsV_{3}Sb_{5}

The transition-metal-based kagome metals provide a versatile platform for correlated topological phases hosting various electronic instabilities. While superconductivity is rare in layered kagome compounds, its interplay with nontrivial topology could offer an engaging space to realize exotic excita...

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Autores principales:	Zuowei Liang, Xingyuan Hou, Fan Zhang, Wanru Ma, Ping Wu, Zongyuan Zhang, Fanghang Yu, J.-J. Ying, Kun Jiang, Lei Shan, Zhenyu Wang, X.-H. Chen
Formato:	article
Lenguaje:	EN
Publicado:	American Physical Society 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/2c2d09935ce147758e16e3b629527806
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spelling	oai:doaj.org-article:2c2d09935ce147758e16e3b6295278062021-12-02T16:58:19ZThree-Dimensional Charge Density Wave and Surface-Dependent Vortex-Core States in a Kagome Superconductor CsV_{3}Sb_{5}10.1103/PhysRevX.11.0310262160-3308https://doaj.org/article/2c2d09935ce147758e16e3b6295278062021-08-01T00:00:00Zhttp://doi.org/10.1103/PhysRevX.11.031026http://doi.org/10.1103/PhysRevX.11.031026https://doaj.org/toc/2160-3308The transition-metal-based kagome metals provide a versatile platform for correlated topological phases hosting various electronic instabilities. While superconductivity is rare in layered kagome compounds, its interplay with nontrivial topology could offer an engaging space to realize exotic excitations of quasiparticles. Here, we use scanning tunneling microscopy to study a newly discovered Z_{2} topological kagome metal CsV_{3}Sb_{5} with a superconducting ground state. We observe charge modulation associated with the opening of an energy gap near the Fermi level. When across single-unit-cell surface step edges, the intensity of this charge modulation exhibits a π-phase shift, suggesting a three-dimensional 2×2×2 charge density wave ordering. Interestingly, while conventional Caroli–de Gennes–Matricon bound states are observed inside the superconducting vortex on the Sb surfaces, a robust zero-bias conductance peak emerges that does not split in a large distance when moving away from the vortex center on the Cs 2×2 surfaces, resembling the Majorana bound states arising from the superconducting Dirac surface states in Bi_{2}Te_{3}/NbSe_{2} heterostructures. Our findings establish CsV_{3}Sb_{5} as a promising candidate for realizing exotic excitations at the confluence of nontrivial lattice geometry, topology and multiple electronic orders.Zuowei LiangXingyuan HouFan ZhangWanru MaPing WuZongyuan ZhangFanghang YuJ.-J. YingKun JiangLei ShanZhenyu WangX.-H. ChenAmerican Physical SocietyarticlePhysicsQC1-999ENPhysical Review X, Vol 11, Iss 3, p 031026 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Zuowei Liang Xingyuan Hou Fan Zhang Wanru Ma Ping Wu Zongyuan Zhang Fanghang Yu J.-J. Ying Kun Jiang Lei Shan Zhenyu Wang X.-H. Chen Three-Dimensional Charge Density Wave and Surface-Dependent Vortex-Core States in a Kagome Superconductor CsV_{3}Sb_{5}
description	The transition-metal-based kagome metals provide a versatile platform for correlated topological phases hosting various electronic instabilities. While superconductivity is rare in layered kagome compounds, its interplay with nontrivial topology could offer an engaging space to realize exotic excitations of quasiparticles. Here, we use scanning tunneling microscopy to study a newly discovered Z_{2} topological kagome metal CsV_{3}Sb_{5} with a superconducting ground state. We observe charge modulation associated with the opening of an energy gap near the Fermi level. When across single-unit-cell surface step edges, the intensity of this charge modulation exhibits a π-phase shift, suggesting a three-dimensional 2×2×2 charge density wave ordering. Interestingly, while conventional Caroli–de Gennes–Matricon bound states are observed inside the superconducting vortex on the Sb surfaces, a robust zero-bias conductance peak emerges that does not split in a large distance when moving away from the vortex center on the Cs 2×2 surfaces, resembling the Majorana bound states arising from the superconducting Dirac surface states in Bi_{2}Te_{3}/NbSe_{2} heterostructures. Our findings establish CsV_{3}Sb_{5} as a promising candidate for realizing exotic excitations at the confluence of nontrivial lattice geometry, topology and multiple electronic orders.
format	article
author	Zuowei Liang Xingyuan Hou Fan Zhang Wanru Ma Ping Wu Zongyuan Zhang Fanghang Yu J.-J. Ying Kun Jiang Lei Shan Zhenyu Wang X.-H. Chen
author_facet	Zuowei Liang Xingyuan Hou Fan Zhang Wanru Ma Ping Wu Zongyuan Zhang Fanghang Yu J.-J. Ying Kun Jiang Lei Shan Zhenyu Wang X.-H. Chen
author_sort	Zuowei Liang
title	Three-Dimensional Charge Density Wave and Surface-Dependent Vortex-Core States in a Kagome Superconductor CsV_{3}Sb_{5}
title_short	Three-Dimensional Charge Density Wave and Surface-Dependent Vortex-Core States in a Kagome Superconductor CsV_{3}Sb_{5}
title_full	Three-Dimensional Charge Density Wave and Surface-Dependent Vortex-Core States in a Kagome Superconductor CsV_{3}Sb_{5}
title_fullStr	Three-Dimensional Charge Density Wave and Surface-Dependent Vortex-Core States in a Kagome Superconductor CsV_{3}Sb_{5}
title_full_unstemmed	Three-Dimensional Charge Density Wave and Surface-Dependent Vortex-Core States in a Kagome Superconductor CsV_{3}Sb_{5}
title_sort	three-dimensional charge density wave and surface-dependent vortex-core states in a kagome superconductor csv_{3}sb_{5}
publisher	American Physical Society
publishDate	2021
url	https://doaj.org/article/2c2d09935ce147758e16e3b629527806
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Three-Dimensional Charge Density Wave and Surface-Dependent Vortex-Core States in a Kagome Superconductor CsV_{3}Sb_{5}

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