IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Magnetic Field induced order by disorder state selection in the classical bilayer honeycomb lattice
Autor/es:
F. GÓMEZ ALBARRACÍN
Lugar:
Natal
Reunión:
Workshop; Latin American Workshop in condensed matter: low dimensional topological condensed matter; 2015
Institución organizadora:
International Institute of Physics - Universidad Federal de Río Grande del Norte
Resumen:
(talk) We present a thorough study of a classical magnetic spin system: the bilayer honeycomb lattice with frustrating interlayer couplings. We show that in some particular cases this system is highly frustrated and has a degenerate ground state. We study through Monte Carlo simulations its behaviour with temperature under an external magnetic field. We find that, depending on this field, different states are selected from the ground state manifold through the order by disorder mechanism. We study different parameters to define the selected states, broken symmetries and phase transitions, and present the h-T phase diagram. Using  analytical calculations and the specific heat curve we show that there are soft and zero modes in the thermal fluctuations of different states, which give rise to their selection due to order by disorder.
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