Dresden 2014 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 15: Spin structures and Magnetic Phase Transitions

MA 15.13: Vortrag

Dienstag, 1. April 2014, 12:45–13:00, HSZ 403

RKKY Interactions in Quasiperiodic Systems — •Stefanie Thiem and John Chalker — Theoretical Physics, Oxford University, 1 Keble Road, Oxford OX1 3NP, UK

We study the structure of the magnetic ground state and the low-temperature behaviour of the magnetic moments in quasiperiodic tilings due to the RKKY mechanism. We compute the exchange interactions between the magnetic impurities by a continued fraction expansion of the Green’s function of the conduction electrons. Based on these results we apply Monte Carlo simulations to study the alignment of the Ising spins in these tilings.