Dresden 2026 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 7: Poster Magnetism I

MA 7.56: Poster

Montag, 9. März 2026, 09:30–12:30, P2

Growth of MnSe₂ Single Crystals as a Candidate for Supercell Altermagnets — •Mayra Handel, Franziska Walther, Sarah Krebber, Cornelius Krellner, and Kristin Kliemt — Physikalisches Institut, Goethe Universität Frankfurt, 60438 Frankfurt am Main

MnSe₂ is predicted to be a supercell altermagnet with d-wave order [1] at a temperature below T_N=49K [2]. MnSe₂ crystallizes in a cubic structure and shows a commensurate magnetic structure. Supercell altermagnets are characterized by a magnetic unit cell that is an integer multiple of the crystallographic unit cell. The enlarged magnetic unit cell introduces additional degrees of freedom in supercell altermagnets, enabling control over the spatial orientation of the order parameter. We report on the current progress in the growth of MnSe₂ single crystals by means of chemical vapor transport, employing various stoichiometries and transport agents. In addition, we present the chemical and structural characterization of polycrystalline samples of MnSe₂.
[1] R. Jaeschke-Ubiergo et al., Phys. Rev. B 109, 094425 (2024)
[2] T. Chattopadhyay et al., Solid State Communications 63, 65 (1987)

Keywords: Altermagnet; Supercell altermagnet; MnSe2; Crystal growth; chemical vapour transport