The reduction in lattice thermal conductivity (LTC) of porous materials is investigated in “gray medium” approximation. Four different models of thermoelectric materials are examined including model with randomly distributed hollow pores of varying diameter from nano- to micro-scale sizes. In all cases we have suggested simple and general relations for the LTC taking into account pore size effect.
A new class of nonradiative surface electromagnetic waves guided by the interface between two enantiomorph uniaxially bianisotropic media is predicted. The waves are caused by bianisotropy and are absent in the case of enantiomorph bi-isotropic materials. The basic properties of the waves, in particular, dispersion relation and localization conditions differ dramatically from those for conventional surface waves propagating along the interface between chiral and achiral media, as well as between two different achiral media. These waves can be considered as a generalization of Dyakonovtype surface waves in the case of enantiomeric bianisotropic media.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.