Berlin 2024 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 14: Focus Session: Frustrated Magnetism and Local Order (joint session MA/TT)

Dienstag, 19. März 2024, 09:30–13:15, H 1058

Recent experimental findings illustrate unexpected spin glass behavior in a variety of frustrated magnets. Often their description goes beyond conventional pictures of spin glasses. For instance, the interplay of antiferromagnetism and spin glass behavior was recently studied. Such systems could be used to study the gradual evolution of spin glass behavior in an itinerant magnet without a change of the crystallographic environment. In this context, the discovery of the so-called self-induced spin glass in elemental neodymium showed that glassy behavior can even exist in the absence of disorder, leading to local magnetic order in the absence of long-range order. This focus session brings together experts from different subfields of frustrated magnetism and with different experimental and theoretical expertise, in order to exchange conceptual ideas beyond "traditional" paradigms of spin glasses and frustrated magnetism. These conceptual ideas are linked to fields such as artificially built frustrated magnets (e.g. spin ice), multi-well systems with complex dynamics, or fragile magnetic systems that may exhibit complex magnetic order.

Coordinators: Daniel Wegner and Alexander A. Khajetoorians (Radboud University, Nijmegen)

	09:30	MA 14.1	Hauptvortrag: Neutron scattering studies of spin-freezing phenomena at quantum phase transitions — •Christian Pfleiderer
	10:00	MA 14.2	Hauptvortrag: Frustrations, glassiness and complexity of spin systems with large spatial dimension — •Mikhail Katsnelson
	10:30	MA 14.3	Hauptvortrag: Self-Induced Spin Glass Phase and Thermally Induced Order in dhcp Nd — •Anders Bergman
	11:00	MA 14.4	Spatially resolved aging and rejuvenation in a self-induced spin glass — •Lorena Niggli, Julian H. Strik, Zhengyuan Liu, Anders Bergman, Mikhail I. Katsnelson, Daniel Wegner, and Alexander A. Khajetoorians
	11:15	MA 14.5	Multipolar order in the 5d double perovskite Ba2MgReO6 from DFT+DMFT — Maximilian E. Merkel and •Claude Ederer
	11:30		15 min. break
	11:45	MA 14.6	Hauptvortrag: Frustrated Quantum Devices: Pathways to leverage exotic order in novel spintronic technologies — •James Analytis
	12:15	MA 14.7	Noncoplanar and chiral spin states on the way towards Néel ordering in fullerenes — •Attila Szabó, Sylvain Capponi, and Fabien Alet
	12:30	MA 14.8	Frustrated magnetism in novel layered Mott insulators. — •Sergii Grytsiuk, Mikhail I. Katsnelson, Erik G.C.P. van Loon, and Malte Rösner
	12:45	MA 14.9	Hauptvortrag: New Frontiers in Artificial Spin Ice: Phase Transitions in Two and Three Dimensions — •Gavin M. Macauley, Luca Berchialla, Aleksandra Pac, Tianyue Wang, Armin Kleibert, Valerio Scagnoli, Peter M. Derlet, and Laura J. Heyrderman