RT Journal Article
T1 Dynamics of thermal effects in the spin-wave theory of quantum antiferromagnets
A1 Rivas Vargas, Ángel
A1 Martín-Delgado Alcántara, Miguel Ángel
AB We derive a master equation that allows us to study non-equilibrium dynamics of a quantum antiferromagnet. By resorting to spin-wave theory, we obtain a closed analytic form for the magnon decay rates. These turn out to be closely related to form factors, which are experimentally accessible by means of neutron and Raman scattering. Furthermore, we compute the time evolution of the staggered magnetization showing that, for moderate temperatures, the magnetic order is not spoiled even if the coupling is fully isotropic.
PB Elsevier Masson
SN 0003-4916
YR 2013
FD 2013-04
LK https://hdl.handle.net/20.500.14352/35623
UL https://hdl.handle.net/20.500.14352/35623
LA eng
NO © 2012 Elsevier Inc. We thank the Spanish MICINN grant FIS2009-10061, CAM research consortium QUITEMAD S2009-ESP1594, European Commission PICC: FP7 2007-2013, Grant No. 249958, UCM-BS grant GICC-910758.
NO Unión Europea. FP7
NO Ministerio de Ciencia e Innovación (MICINN)
NO Comunidad de Madrid
NO Universidad Complutense de Madrid/Banco de Santander
DS Docta Complutense
RD 6 oct 2024