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MA: Fachverband Magnetismus
MA 11: Electron Theory of Magnetism and Correlations (joint session MA/TT)
MA 11.5: Vortrag
Montag, 9. März 2026, 16:00–16:15, POT/0151
Spectroscopic evidence of Kondo resonance in 3d van der Waals ferromagnets — •Deepali Sharma1,2, Neeraj Bhatt1, Asif Ali1, Rajeswari Roy Chowdhury1, Chandan Patra1, Ravi Prakash Singh1, and Ravi Shankar Singh1 — 1IISER Bhopal, Bhopal, India — 2TU Dortmund, Dortmund, Germany
Two-dimensional van der Waals (vdW) ferromagnets drive the advancement in spintronic applications and enable the exploration of exotic magnetism in low-dimensional systems. The entanglement of the dual−localized and itinerant−nature of electrons lies at the heart of the correlated electron systems giving rise to exotic ground state properties such as complex magnetism, heavy fermionic behavior, Kondo lattice formation, etc. Through temperature-dependent electronic structure of vdW ferromagnets, Co substituted Fe3GeTe2, probed using high-resolution photoemission spectroscopy and density functional theory combined with dynamical mean field theory (DFT + DMFT), we provide direct evidence of the emergence of Kondo resonance peak driven by complex interplay between localized and itinerant electrons. Further, in overall agreement with the experimental electronic structure and magnetic properties, DFT + DMFT also reveals non-Stoner magnetism. The findings provide a way forward to the understanding of complex interplay between electronic structure, exotic magnetism, and heavy fermionic behavior leading to the Kondo scenario in 3d vdW ferromagnets.
Keywords: Magnetism; Electron correlation; van der Waal materials; Photoemmission spectroscopy; Dynamical mean field theory