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SUMMARY:Recent advances in topological material characterisations\, 1 - Ro
 bert-Jan Slager
DTSTART:20210531T090000Z
DTEND:20210531T100000Z
UID:TALK159982@talks.cam.ac.uk
CONTACT:Nigel Cooper
DESCRIPTION:We will consider recent developments in topological characteri
 sations of free fermion systems. Starting from some simple models to recap
 itulate some of the basics concepts we will then move on to recently devel
 oped classification schemes. This will involve an analysis that profits fr
 om an interplay of symmetry and topology\, taking into account the role of
  crystalline symmetries. In particular\, we will outline on a qualitative 
 level how this connects to a deeper framework known as equivariant K-theor
 y. Using these concepts we will address recent developments known as topol
 ogical quantum chemistry and symmetry indicators. Finally\, we will turn o
 ur attention to new kinds of fragile topologies and multi-gap phases that 
 are emerging at the moment. The overarching idea is to give an intuitive u
 nderstanding of these new concepts\, using explicit examples\,  that will 
 make it easier to read this rapidly evolving branch of literature.\n\nSee 
 the "TCM graduate teaching page":https://www.tcm.phy.cam.ac.uk/impact/teac
 hing.html for further information.
LOCATION:TCM Virtual Seminar Room
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