Dresden 2026 – scientific programme

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MA: Fachverband Magnetismus

MA 8: Altermagnets II

MA 8.5: Talk

Monday, March 9, 2026, 16:00–16:15, HSZ/0002

Ce₄Sb₃: A Kondo metal as candidate for d-wave altermagnetism — •Franziska Walther¹, Thomas J. Hicken², Venkata Krishna Bharadwaj³, Julian Kaiser⁴, Bin Shen⁴, Jan Priessnitz⁵, Rahel Ohlendorf⁶, Michelle Ocker¹, Alexander Fedorov⁷, Anton Jesche⁴, Hubertus Luetkens², Philipp Gegenwart⁴, Elena Gati⁷, Denis Vyalikh⁸, Libor Šmejkal⁵, Jairo Sinova³, Cornelius Krellner¹, and Kristin Kliemt¹ — ¹Uni Frankfurt, Germany — ²PSI, Switzerland — ³Uni Mainz, Germany — ⁴Uni Augsburg, Germany — ⁵MPI PKS Dresden, Germany — ⁶MPI CPfS Dresden, Germany — ⁷HZB Berlin, Germany — ⁸DIPC Donostia, Spain

The study of altermagnetic materials has been focused so far on magnetic d-systems. Here, we present Ce₄Sb₃ as a lanthanoid-based altermagnetic candidate to study the altermagnetism arising from local 4f moments, where magnetism is mediated indirectly by the RKKY interaction. Below 4 K, the cubic compound Ce₄Sb₃ orders magnetically and d-wave altermagnetism is theoretically predicted. Furthermore, the material shows Kondo behaviour, enabling it to be a promising candidate to study pressure-induced quantum critical phenomena in systems with altermagnetic spin fluctuations. Here, we report on the single crystal growth by the Czochralski method in a quasi-crucible free high pressure setup, the physical characterization of the magnetic ground state and a first study by angle-resolved photoemission and muon spin spectroscopy.

Keywords: Altermagnet; Kondo; ARPES; Crystal Growth; Quantum critical phenomena