Annual meeting of the Swiss Physical Society 2018

【601】 Topology-driven thermoelectricity and non-abelian statistics in momentum space

30 Aug 2018, 14:00

30m

CE 2 (EPFL)

Talk Advances in Topological Materials Advances in Topological Materials

Speaker

Alexey Soluyanov (ETH Zurich)

Description

I will present examples of metals, which have topologically protected crossings in the phonon spectrum. I will show how the topological invariant of such crossings is defined and will show that the presence of such crossings puts the hosting metals among the best known thermoelectric metallic compounds.
Apart from that I will introduce the notion of non-abelian topological charge, defined in momentum space, and predicted previously in some phases of liquid He. I will show how this phase is realized in simple weakly-interacting crystalline compounds.