APS Colloquium: ‘Layered Thermoelectric Materials’
Bo Brummerstedt Iversen, professor of chemistry at Aarhus University, will present “Layered Thermoelectric Materials” Wednesday, April 17, 2019, at 3 p.m. in the Building 402 Auditorium.
Layered (2-D) materials exhibit a variety of extraordinary properties, and recent focus has included topological insulators, electrode materials, monolayers, heterostructures and thermoelectrics. The physical properties, such as band gap or thermal and electrical conductivity, are related to the detailed structural characteristics as well as the specific chemical bonding both within the covalent layers and across the van der Waal gap. It is generally assumed that layered materials exhibit anisotropic properties, but the properties are rarely discussed in direct relation to the specific chemical bonding characteristics of the solid. Using advanced crystallographic analysis including charge density modelling, as well as ab initio theoretical calculations, we have studied the crystal structures, chemical bonding, and physical properties of a range of important layered thermoelectric materials including Cu2Se, Mg3Sb2, SnS2, TiS2 and SnSe.