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TT: Fachverband Tiefe Temperaturen
TT 95: Fe-based Superconductors
TT 95.8: Vortrag
Freitag, 13. März 2026, 11:30–11:45, HSZ/0103
Local-moment magnetism in Mn-based pnictides — •Matteo Crispino1, Niklas Witt1, Tommaso Gorni2, Giorgio Sangiovanni1, and Luca de’ Medici2 — 1Institut für Theoretische Physik und Astrophysik and Würzburg-Dresden Cluster of Excellence ct.qmat, Universität Würzburg, 97074 Würzburg, Germany — 2LPEM, ESPCI Paris, PSL Research University, CNRS, Sorbonne Université, 75005 Paris, France
We report a comprehensive study of electronic-correlation effects in Manganese-based antiferromagnetic pnictides BaMn2Pn2 (Pn=P,As,Sb,Bi). Our density functional theory plus slave-spin mean-field simulations indicate that all the compounds lie on the strong-coupling side of an itinerant-to-localized moment crossover, corresponding to the critical interaction strength for the Mott transition in the high-temperature paramagnetic phase. We also show that the experimental Néel temperature of each compound scales with the distance from this crossover.
Keywords: Antiferromagnetism; Manganese-based pnictides; Strongly-correlated electrons