Dresden 2026 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 40: Transport in Materials: Diffusion, Charge, or Heat Conduction IV

MM 40.1: Vortrag

Freitag, 13. März 2026, 10:15–10:30, SCH/A216

Quantum oscillation and tunable charge density wave of kagome metal ScV6Sn6 — •Changjiang Yi, Xiaolong Feng, Chandra Shekhar, and Claudia Felser — Max Planck Institute for Chemcial Physics of Solids

Compounds with kagome lattice structure are known to exhibit Dirac cones, flatbands, and van Hove singularities, which host versatile quantum phenomena. We investigate the magnetoelectric transports along with the theoretical calculations of, a nonmagnetic charge-density wave (CDW) metal. ScV6Sn6 exhibits Shubnikov de Haas quantum oscillations, which help to shape the Fermi-surface (FS). The Dirac band is demonstrated along with a nonzero Berry phase. In addition, the compound also shows the anomalous Hall-like behavior up to the CDW phase transition. Under Cr substitution and hydrostatic pressure, the CDW is largely suppressed. The suppression of CDW phase under pressure can be well captured by our first-principles calculations, evidenced by the lift of imaginary phonon bands. The MR and Hall resistance behave differently under Cr substitution and pressure. Our study reveals that the anomalous Hall-like behavior arises from the kagome lattice and persists as long as the lattice is maintained.

Keywords: kagome lattice; charge density wave; quantum oscillation; anomalou Hall effect