发表机构
Università di Parma; ISIS Pulsed Neutron and Muon Source, Rutherford Appleton Laboratory; PSI Center for Scientific Computing, Theory and Data; University of California Santa Barbara; PSI Center for Neutron and Muon Sciences CNM; Università di Bologna; Università di Modena e Reggio Emilia; CNR-NANO S3—Istituto Nanoscienze（帕尔马大学; 卢瑟福·阿普尔顿实验室 ISIS 脉冲中子和缪子源; 瑞士保罗谢勒研究所科学计算、理论与数据中心; 加州大学圣塔芭芭拉分校; 瑞士保罗谢勒研究所中子和缪子科学中心; 博洛尼亚大学; 摩德纳和雷焦艾米利亚大学; 意大利国家研究委员会纳米科学研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究采用避免能级交叉μ子自旋光谱技术，探究AV₃Sb₅笼目金属CDW态内的电荷有序演化，识别出无法仅用内部磁场解释的二级相变，揭示了额外电荷调制的存在。
AI 中文摘要
AV₃Sb₅笼目金属的特征是电子序与结构序相互交织，这一特性促使近年来开展了大量研究。然而，超导相之前的电子态细节仍鲜为人知。本研究将此前针对RbV₃Sb₅的研究（Phys. Rev. Research 7, L032046 (2025)）扩展至A=Cs和K体系，采用避免能级交叉（ALC）μ子自旋光谱技术。与此前研究一致，本研究识别出一个二级相变，其起源不能仅归因于内部磁场，表明存在额外的电子机制，该机制会微妙地改变V面内的电荷分布。具体而言，ALC结果表明，在电荷密度波（CDW）相内存在额外的电荷调制，对于A=Cs和Rb，该调制发生在T*<T_CDW时；对于A=K，则发生在T_CDW附近。
英文摘要
AV$_3$Sb$_5$ kagome metals are characterized by intertwined electronic and structural orders, which motivated extensive studies in recent years. Yet the details of the electronic state preceding the superconducting phase remain poorly understood. Here we extend our previous investigation [Phys. Rev. Research 7, L032046 (2025)] of RbV$_3$Sb$_5$ using avoided level crossing (ALC) muon-spin spectroscopy to the $A$ = Cs and K systems. Consistent with our previous study, we identify a second transition whose origin cannot be attributed solely to an internal magnetic field, indicating the involvement of an additional electronic mechanism that subtly modifies the charge distribution within the V plane. In particular, the ALC results point towards an additional charge modulation taking place within the charge density wave (CDW) phase and occurring at $T^{*}<T_{CDW}$ for $A$ = Cs and Rb, or in the vicinity of $T_{CDW}$ for $A$ = K.
