Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

TT: Fachverband Tiefe Temperaturen

TT 37: Correlated Electrons: Poster

TT 37.25: Poster

Mittwoch, 19. März 2025, 15:00–18:00, P4

Electronic Structures of AgCrS₂, AgCrSe₂, and Cr₃Se₄ — •Seo-Jin Kim, Jörg Sichelschmidt, Michael Baenitz, Marcus Schmidt, and Helge Rosner — Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany

We study the electronic structures of triangular lattice systems AgCrS₂, AgCrSe₂, and the related compound Cr₃Se₄ using density functional theory (DFT). Although AgCrSe₂ and AgCrS₂ are isostrucural, they exhibit different physical properties. AgCrSe₂ is a self-doped p-type semiconductor characterized by spin-polarized surface states[1], the cycloidal magnetic ordering[2], and the unconventional anomalous Hall effect[3] and directional Kondo transport[4]. In contrast, AgCrS₂ is an insulator that undergoes symmetry lowering to a monoclinic phase and exhibits a collinear double-stripe antiferromagnetic ground state below T_N = 42 K. This study aims to present a comprehensive analysis of the electronic structures of these compounds. Additionally, we extend our investigation to the structurally related compound Cr₃Se₄.

[1] M. Baenitz et al., Phys. Rev. B 104, 134410 (2021);

[2] G.-R. Siemann et al., npj Quantum Mater. 8, 61 (2023);

[3] S.-J. Kim et al., Adv. Sci. 11, 2307306 (2024);

[4] J. Guimaraes et al., Commun. Phys. 7, 176 (2024).

Keywords: DFT; electronic structure; triangular lattice