2026-06-03T14:15:05Z https://archive.materialscloud.org/oai2d

oai:materialscloud.org:2087 2024-03-03T23:33:33Z openaire_data community-mcarchive

Hu, Yong Han, Xinloong Shi, Ming Hu, Yong Ma, Junzhang Li, Yinxiang Jiang, Yuxiao Gawryluk, Dariusz Jakub Hu, Tianchen Teyssier, Jérémie Multian, Volodymyr Yin, Zhouyi Xu, Shuxiang Shin, Soohyeon Plokhikh, Igor Han, Xinloong Plumb, Nicholas C. Liu, Yang Yin, Jia-Xin Guguchia, Zurab Zhao, Yue Schnyder, Andreas P. Wu, Xianxin Pomjakushina, Ekaterina Hasan, M. Zahid Wang, Nanlin Shi, Ming 2024-03-03 Charge density wave (CDW) orders in vanadium-based kagome metals have recently received tremendous attention, yet their origin remains a topic of debate. The discovery of ScV₆Sn₆, a bilayer kagome metal featuring an intriguing √3 x √3 x 3 CDW order, offers a novel platform to explore the underlying mechanism behind the unconventional CDW. Here, we combine high-resolution angle-resolved photoemission spectroscopy, Raman scattering and density functional theory to investigate the electronic structure and phonon modes of ScV₆Sn₆. We identify topologically nontrivial surface states and multiple van Hove singularities (VHSs) in the vicinity of the Fermi level, with one VHS aligning with the in-plane component of the CDW vector near the K ̅ point. Additionally, Raman measurements indicate a strong electron-phonon coupling, as evidenced by a two-phonon mode and new emergent modes. Our findings highlight the fundamental role of lattice degrees of freedom in promoting the CDW in ScV₆Sn₆. text/markdown application/vnd.openxmlformats-officedocument.spreadsheetml.sheet application/zip application/vnd.openxmlformats-officedocument.spreadsheetml.sheet https://doi.org/10.24435/materialscloud:tw-tw oai:materialscloud.org:2087 mcid:2024.42 eng Materials Cloud https://doi.org/10.1038/s41467-024-45859-y https://archive.materialscloud.org/communities/mcarchive https://doi.org/10.24435/materialscloud:mz-ng info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode Kagome metal ScV6Sn6 ARPES, Raman, STM, DFT NCCR MARVEL Phonon promoted charge density wave in topological kagome metal ScV₆Sn₆ info:eu-repo/semantics/other