Dresden 2011 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 63: Poster II (Surface Magnetism/ Magnetic Imaging/ Topological Insulators/ Spin Structures and Magnetic Phase Transitions/ Graphene/ Magnetic Thin Films/ Magnetic Semiconductors/ Magnetic Half-metals and Oxides/ Spin-dependent Transport/ Spin Excitations and Spin Torque/ Spin Injection and Spin Currents in Heterostructures/ Spintronics/ Magnetic Storage and Applications)
MA 63.96: Poster
Freitag, 18. März 2011, 11:00–14:00, P2
Non-Abelian Berry Curvature by the KKR method — •Martin Gradhand1, Dmitry V. Fedorov2, Falko Pientka2, Peter Zahn2, Ingrid Mertig2,1, and Balazs L. Györffy3 — 1Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany — 2Martin-Luther-Universität Halle, Institut für Physik, 06099 Halle, Germany — 3H.H.Wills Physics Laboratory, University of Bristol, United Kingdom
The existence of the geometrical phase, discovered by Michael Berry [1], for a quantum mechanical system with an adiabatically varied parameter is known since 25 years. However, its influence on many aspects of modern physics turned out during the last decade only. Nowadays the concept is used to describe transport phenomena as the anomalous and spin Hall effect as well as quantities such as the orbital magnetization and electrical polarization. In spite of the broad application of the Berry curvature, used for the description of these phenomena, a few ab initio methods only were developed for its calculation.
Here, within the Korringa-Kohn-Rostoker method, we present a new implementation of the Berry curvature calculation extended to the non-Abelian case where degenerate electron states exist. We discuss the method in detail and show results for metals as Cu, Ag, Au, and Pt.
[1] M.V. Berry, Proceedings of the Royal Society of London, A 392, 45 (1984).