Přednášející: Lars Bergqvist (KTH Royal Institute of Technology, Stockholm, Sweden)
Místo: Na Slovance, přednáškový sál v přízemí
Jazyk: anglicky
Pořadatelé:
Oddělení teorie kondenzovaných látek
Abstract:
We examine the experimental absence of standing spin wave modes in thin
magnetic films, by means of atomistic spin dynamics simulations [1].
Using Co on Cu(001) as a model system, we demonstrate that by increasing
the number of layers, the optical branches predicted
from adiabatic first-principles calculations are strongly suppressed, in
agreement with spin-polarized electron energy loss spectroscopy
measurements reported in the literature. Our results suggest that
a dynamical analysis of the Heisenberg model is sufficient in
order to capture the strong damping of the standing modes.
[1] Phys. Rev. Lett. 107, 037202 (2011).
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