Dresden 2026 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 7: Poster Magnetism I
MA 7.59: Poster
Montag, 9. März 2026, 09:30–12:30, P2
NEGF Quantum Transport Simulations in Altermagnetic Systems — •Tim Kalsberger1, Erik Schroedter1, Nicola Lo Gullo2, Jan-Philip Joost1, and Michael Bonitz1 — 1CAU Kiel, Germany — 2Università della Calabria, Italy
Altermagnets have the potential to open a broad landscape of new applications. Promising examples include the fields of spintronics and ultrafast photomagnetism, which combine the special properties of altermagnets with ultrafast dynamics and quantum transport. One of these properties is the emergence of spin-polarized currents under an applied bias due to the spin-anisotropic Fermi surface, despite having zero net magnetization [1]. Accurate simulations of spin-resolved dynamics in large, strongly correlated systems are challenging and, with most methods, often impossible for long time scales due to the large basis size and complexity, even for simple lattice models. In this work, we use the quantum fluctuations approach based on non-equilibrium Green functions (NEGF) [2, 3] to simulate correlated, time-resolved, large altermagnetic systems out of equilibrium in scenarios aligned with realistic experimental setups.
[1] Šmejkal et al., Emerging Research Landscape of Altermagnetism. Phys. Rev. X 12, 040501 (2022).
[2] E. Schroedter et al., Quantum fluctuations approach to the nonequilibrium GW approximation, Condens. Matter Phys. 25, 23401 (2022).
[3] E. Schroedter et al., "Nonequilibrium Green Functions Simulations for Large Systems", subm. for publication
Keywords: NEGF; Altermagnets; Quantum Transport