Interaction of Lamb modes with two-level systems in amorphous nanoscopic membranes

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dc.creatorKühn, T.
dc.creatorAnghel, D. V.
dc.creatorGalperin, Y. M.
dc.creatorManninen, M.
dc.date2007-05-14
dc.date.accessioned2026-07-07T08:39:21Z
dc.date.available2026-07-07T08:39:21Z
dc.descriptionUsing a generalized model of interaction between a two-level system (TLS) and an arbitrary deformation of the material, we calculate the interaction of Lamb modes with TLSs in amorphous nanoscopic membranes. We compare the mean free paths of the Lamb modes with different symmetries and calculate the heat conductivity $κ$. In the limit of an infinitely wide membrane, the heat conductivity is divergent. Nevertheless, the finite size of the membrane imposes a lower cut-off for the phonons frequencies, which leads to the temperature dependence $κ\propto T(a+b\ln T)$. This temperature dependence is a hallmark of the TLS-limited heat conductance at low temperature.
dc.description9 pages, 2 figures
dc.identifierhttps://arxiv.org/abs/0705.1936
dc.identifierhttp://arxiv.org/abs/0705.1936
dc.identifierPhys. Rev. B 76, 165425 (2007)
dc.identifierdoi:10.1103/PhysRevB.76.165425
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/141043
dc.subjectMesoscale and Nanoscale Physics
dc.subjectDisordered Systems and Neural Networks
dc.titleInteraction of Lamb modes with two-level systems in amorphous nanoscopic membranes
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