Phonon promoted charge density wave in topological kagome metal ScV₆Sn₆

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<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>Hu, Yong</dc:creator>
  <dc:creator>Ma, Junzhang</dc:creator>
  <dc:creator>Li, Yinxiang</dc:creator>
  <dc:creator>Jiang, Yuxiao</dc:creator>
  <dc:creator>Gawryluk, Dariusz Jakub</dc:creator>
  <dc:creator>Hu, Tianchen</dc:creator>
  <dc:creator>Teyssier, Jérémie</dc:creator>
  <dc:creator>Multian, Volodymyr</dc:creator>
  <dc:creator>Yin, Zhouyi</dc:creator>
  <dc:creator>Xu, Shuxiang</dc:creator>
  <dc:creator>Shin, Soohyeon</dc:creator>
  <dc:creator>Plokhikh, Igor</dc:creator>
  <dc:creator>Han, Xinloong</dc:creator>
  <dc:creator>Plumb, Nicholas C.</dc:creator>
  <dc:creator>Liu, Yang</dc:creator>
  <dc:creator>Yin, Jia-Xin</dc:creator>
  <dc:creator>Guguchia, Zurab</dc:creator>
  <dc:creator>Zhao, Yue</dc:creator>
  <dc:creator>Schnyder, Andreas P.</dc:creator>
  <dc:creator>Wu, Xianxin</dc:creator>
  <dc:creator>Pomjakushina, Ekaterina</dc:creator>
  <dc:creator>Hasan, M. Zahid</dc:creator>
  <dc:creator>Wang, Nanlin</dc:creator>
  <dc:creator>Shi, Ming</dc:creator>
  <dc:date>2024-03-03</dc:date>
  <dc:description>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.</dc:description>
  <dc:identifier>https://archive.materialscloud.org/record/2024.42</dc:identifier>
  <dc:identifier>doi:10.24435/materialscloud:tw-tw</dc:identifier>
  <dc:identifier>mcid:2024.42</dc:identifier>
  <dc:identifier>oai:materialscloud.org:2087</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Materials Cloud</dc:publisher>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:rights>Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode</dc:rights>
  <dc:subject>Kagome metal ScV6Sn6</dc:subject>
  <dc:subject>ARPES, Raman, STM, DFT</dc:subject>
  <dc:subject>NCCR MARVEL</dc:subject>
  <dc:title>Phonon promoted charge density wave in topological kagome metal ScV₆Sn₆</dc:title>
  <dc:type>Dataset</dc:type>
</oai_dc:dc>