Berlin 2024 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 13: Kagome Systems

TT 13.5: Talk

Monday, March 18, 2024, 16:00–16:15, H 3010

⁵¹ V Nuclear Magnetic Resonance as a Local Probe for the Charge Ordered Kagome System ScV₆Sn₆ — •Robin Guehne, Jonathan Noky, Chandra Shekhar, Maia G. Vergniory, Michael Baenitz, and Claudia Felser — Max Planck Institute for Chemical Physics of Solids, Dresden, Germany

Intermetallic compounds featuring Kagome lattice planes have lately attracted immense attention as platforms that provide the opportunity to study a diversity of topological features, like van Hove singularities, Dirac cones, and correlated flat bands. Some of these materials show long-range charge order. This is the case for the Vanadium based Kagome metal ScV₆Sn₆ that undergoes a charge density wave (CDW) transition around 96 K. The origin of this transition is still under debate, even more so the properties of the CDW phase, such as related to chirality of the charge order or hidden magnetism [1]. We use ⁵¹V nuclear magnetic resonance (NMR) to investigate the CDW phase transition from a local point of view. Aided by density functional theory (DFT), NMR allows us to separate the chemistry from electronic properties and to identify the CDW fingerprint encoded in the NMR shift and relaxation amid the structural phase transition that manifests in the electric quadrupole interaction. In the presentation we will give an overview of the results and discuss potential implications.

[1] C. Yi, X. Feng, P. Yanda, S. Roychowdhury, C. Felser, C. Shekhar, arXiv:2305.04683 (2023)

Keywords: Charge Density Wave; Nuclear Magnetic Resonance; Phase Transition