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Summary: The pressure evolution of the superconducting kagome metal CsV3Sb5 is studied using experimental and computational methods. The results show that pressure leads to a highly anisotropic compression due to the fast shrinkage of the Cs-Sb distances and suppression of Cs rattling motion. Additionally, it is found that Sb atoms play a central role in stabilizing the three-dimensional charge-density wave and Fermi surface reconstruction.
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Summary: In this study, unconventional superconductivity and a pair density wave (PDW) were observed in CsV3Sb5, a vanadium-based kagome metal. The material exhibits a V-shaped pairing gap and a 3Q PDW, along with other unique characteristics such as strong-coupling superconductivity and charge order. These findings provide insights into the correlated electronic states and superconductivity in vanadium-based kagome metals.
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He Zhao et al.
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PHYSICAL REVIEW LETTERS
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Summary: This study reports the observation of bulk superconductivity in single crystals of the two-dimensional kagome metal KV3Sb5, with further characterization of the normal state as a Z(2) topological metal using density functional theory (DFT) calculations. The presence of superconductivity in the AV(3)Sb(5) (A: K, Rb, Cs) family of compounds suggests a common feature across these materials, establishing them as a rich arena for studying the interplay between bulk superconductivity, topological surface states, and likely electronic density wave order in an exfoliable kagome lattice.
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Jiacheng Gao et al.
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Chao Mu et al.
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Summary: The high-quality CsV3Sb5 single crystals exhibit excellent superconducting and mixed state properties, with a significant anisotropic ratio of Hc2(ab)/Hc2(c) and Hc1(ab)/Hc1(c) larger than 1. The orientation of the two-fold anisotropy in in-plane angular-dependent magnetoresistance displays a unique twist characteristic of the Kagome geometry at a characteristic temperature of around 2.8 K.
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(2021)
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Xu Chen et al.
Summary: This study demonstrates the superconducting performance and high robustness of structural stability of kagome CsV3Sb5 under high pressures, revealing the variation of Tc under different pressures. Changes in electronic structure and electron-phonon coupling may be responsible for the pressure-induced reentrant superconductivity.
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(2021)
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Yu-Xiao Jiang et al.
Summary: The study reveals an unconventional chiral charge order in KV3Sb5, a material with both a topological band structure and a superconducting ground state, using high-resolution scanning tunnelling microscopy. A 2 x 2 superlattice structure is observed in the experiment, along with an energy gap opening and charge modulation across the Fermi level.
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K. Y. Chen et al.
Summary: The study reveals that the CDW transition in CsV3Sb5 decreases with pressure, with an unusual M-shaped double dome in the T-c(P) curve showing enhancement up to 8 K at 2 GPa. This indicates a strong competition between CDW-like order and SC, particularly in the intermediate pressure range of P-c1 <= P <= P-c2.
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(2021)
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F. H. Yu et al.
Summary: The competition between superconductivity and CDW state in the pressurized kagome lattice of CsV3Sb5 displays complex effects, with unexpected double-peak behavior observed under high pressure conditions.
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Zuowei Liang et al.
Summary: Transition-metal-based kagome metals offer a versatile platform for correlated topological phases with various electronic instabilities. The study of a newly discovered Z(2) topological kagome metal CsV3Sb5 with a superconducting ground state reveals charge modulation associated with the opening of an energy gap near the Fermi level. The findings suggest CsV3Sb5 as a promising candidate for realizing exotic excitations at the intersection of nontrivial lattice geometry, topology, and multiple electronic orders.
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Harrison LaBollita et al.
Summary: The electronic structure of the new family of kagome metals AV(3)Sb(5) can be modified by pressure and hole doping, with pressure shifting saddle points away from the Fermi level and doping bringing them closer. This demonstrates how pressure and doping can be used to tune Fermi surface instabilities and associated orders.
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Jian-Feng Zhang et al.
Summary: Using first-principles calculations, we studied the CDW state, superconductivity, and topological properties in CsV3Sb5 under pressures. Our results suggest that the superconductivity and magnetism in CsV3Sb5 vary under different pressure conditions.
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F. H. Yu et al.
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Feng Du et al.
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Zhuyi Zhang et al.
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