Dresden 2011 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 33: Topical Session Electron Theory IV

MM 33.1: Topical Talk

Donnerstag, 17. März 2011, 11:00–11:30, IFW A

Playground magnetism in low-dimensions: impact of first-principles theory — •Stefan Blügel — Peter Grünberg Institut & Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany

Metals in reduced dimensions developed to a playground for interesting magnetic phenomena. In low dimensions, metals that are nonmagnetic in bulk can become magnetic in low dimension, magnetic interaction strengths are largely modified and magnetic anisotropies change by orders of magnitude. Nanostructures with lattices of increasing topological frustration can be grown leading to magnetic structure of unprecedented complexity. Magnetic structures can be modified by local probes. The choice of the substrate is an additional parameter that can modify the physics of these systems. In this presentation is shown, how systematic first-principles calculations based on the density functional theory carried out with innovative cutting edge electronic structure methods can unravel the physical trends in the high-dimensional phase space of low-dimensional magnets and how that inspires suggestions of new systems with unexpected physical phenomena.