Regensburg 2025 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 37: Correlated Electrons: Poster
TT 37.3: Poster
Mittwoch, 19. März 2025, 15:00–18:00, P4
Single Crystal Growth and Characterization of a New Yb-based Heavy Fermion Compound — •Fabian Fiedler1, Florian Stoll1, Kristin Kliemt1, Manuel Brando2, and Cornelius Krellner1 — 1Physikalisches Institut, Goethe-Universität Frankfurt, 60438 Frankfurt am Main, Germany — 2MPI CPfS, 01187 Dresden, Germany
A system near a quantum-critical point usually shows anomalous thermodynamic and transport properties at low temperatures [1,2].
Presently there are only rare cases of such systems with a ferromagnetic ground state together with pronounced Kondo interactions. Especially Yb-based intermetallic compounds with their possible unstable 4f-shell are of interest due to their low magnetic ordering temperatures.
We found a candidate system for Yb-based ferromagnetic quantum criticality with a large and diverging Sommerfeld coefficient below 10 K. We used substitution in order to manipulate the ground state. Here we report on the single crystal growth as well as the structural and physical characterization of these systems.
[1] Steppke et al., Science 331, 933 (2013);
[2] Shen et al., Nature 579, 51 (2020).
Keywords: Crystal growth; Quantum criticality; 4f electrons; Heavy fermions; Correlated electrons