Regensburg 2025 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 3: Correlated Magnetism – General
TT 3.8: Vortrag
Montag, 17. März 2025, 11:30–11:45, H32
Electronic transport measurements in Kagome metal Yb0.5Co3Ge3 — •Zhiyuan Cheng1, Heng Wu2, Yaojia Wang2, Peter van Veldhuizen1, Federica Galli1, Mazhar Ali2, Julia Chan3, and Semonti Bhattacharyya1 — 1Leiden University, Leiden, the Netherlands — 2Delft University of Technology, Delft, the Netherlands — 3Baylor University, Waco, United States
Kagome lattice has a unique geometry that gives rise to interesting band structures. As a result, Kagome lattices exhibit various properties, such as superconductivity, topological surface states, and complex magnetism. However, it is still yet to be well understood how these quantum properties intertwine with each other. Electrical doping, strain, and pressure can be utilized as powerful tools to modulate and investigate the rich physics of such complex systems.
In this project, we investigate a Kagome metal Yb0.5Co3Ge3 that is known to exhibit charge density wave and complex magnetism. Susceptibility measurements performed in this material demonstrate the presence of Yb3+ moments with anti-ferromagnetic interactions and an onset of a week magnetic transition below 25 K. Yet, this complex magnetism is not completely understood.
We carried out magnetotransport measurements on Yb0.5Co3Ge3 to study the interplay of its quantum properties at both ambient pressure (0 GPa) and high pressure (up to 2.0 GPa). Our ambient-pressure measurement shows that this complex magnetism gives rise to Kondo effect. High-pressure measurements reveal a clear signature of an enhancement of the Kondo effect with respect to the pressure.
Keywords: Kagome metal; Kondo effect; Pressure