Regulation of charge density wave and superconductivity in kagome superconductor CsV3Sb5 by intercalation

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International Pub Date : 2025-02-01 DOI:10.1016/j.pnsc.2024.11.001

Han Xiao , Yingxu Zhang , Lixuan Yu , Mengjuan Mi , Xiangqi Liu , Qihui Cui , Bingbing Lyu , Yanfeng Guo , Min Liu , Shanpeng Wang , Yilin Wang

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引用次数: 0

Abstract

AV₃Sb₅ (A = K, Rb, and Cs), recently discovered van der Waals Kagome metals, exhibit a multitude of intriguing strongly correlated phenomena, particularly the unconventional charge density wave (CDW) and superconductivity, and thus have generated tremendous attention. In this study, we modulated CDW orders and superconductivity in CsV₃Sb₅ flakes utilizing an ionic-gel electrolyte (LiClO₄/PEO), which also serves as a protective layer to prevent the CsV₃Sb₅ thin flakes from being degraded in air. The dominated carriers of pristine CsV₃Sb₅ undergoes a transition from electron-type above 50 K to hole-type below 10 K, while both electron and hole carriers participate in the transport process at 25 K. The CDW transition temperature increases (from 86 K up to 106 K) and behaves a positive correlation with the electron-type carrier concentration, while the superconducting transition temperature decreases and behaves a negative correlation with the hole-type carrier concentration. The regulation of carrier density induces a shift in the relative positions of Fermi level and van Hove singularities, leading to the modulation of CDW order and superconductivity. Our work demonstrates CsV₃Sb₅ as a versatile platform for tuning CDW order and superconductivity, and provides valuable insights into the physical properties of Kagome metals.

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来源期刊

Progress in Natural Science: Materials International 综合性期刊-综合性期刊

CiteScore

8.60

自引率

2.10%

发文量

2812

审稿时长

49 days

期刊介绍： Progress in Natural Science: Materials International provides scientists and engineers throughout the world with a central vehicle for the exchange and dissemination of basic theoretical studies and applied research of advanced materials. The emphasis is placed on original research, both analytical and experimental, which is of permanent interest to engineers and scientists, covering all aspects of new materials and technologies, such as, energy and environmental materials; advanced structural materials; advanced transportation materials, functional and electronic materials; nano-scale and amorphous materials; health and biological materials; materials modeling and simulation; materials characterization; and so on. The latest research achievements and innovative papers in basic theoretical studies and applied research of material science will be carefully selected and promptly reported. Thus, the aim of this Journal is to serve the global materials science and technology community with the latest research findings. As a service to readers, an international bibliography of recent publications in advanced materials is published bimonthly.