Extraordinary Spin-Wave Thermal Conductivity in Low-Dimensional Copper Oxides
Final rept. 1 Oct 2011-30 Sep 2014
ILLINOIS UNIV AT URBANA-CHAMPAIGN
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We applied frequency-dependent measurements of thermal transport properties using time-domain thermoreflectance TDTR to advance understanding of thermal transport in low dimensional copper-oxides that display extraordinary thermal transport by thermal excitations of spin degrees of freedom. We measured for the first time the magnon-phonon coupling parameter of a spin-ladder compound over a wide temperature range. We developed advances in the analysis of TDTR that enable measurements of materials such as low dimensional copper oxides with more than one significant type of heat carrier and measurements of the anisotropic thermal conductivity of materials that lack in-plane symmetry.
- Inorganic Chemistry
- Solid State Physics