Topology and the Electromagnetic Responses of Quantum Materials
International Centre for Theoretical Sciences via YouTube
Overview
Syllabus
Start
Topology and the electromagnetic responses of quantum materials
General themes
Outline
Types of order
Overview: Berry gauge fields in solids
Topological invariants
Berry phase
Berry phase in solids
Topological insulator in 3D
What is quantized in a 3D TI? Electrodynamics in insulators...
Axion E&M
Graphene QHE
Topological response
What about metals?
Anomalous Hall effect 100+ years
Two other "mystery" effects in metals:
3D Dirac and Weyl metals
Active questions:
Outline of CME and GME
So linear response is "geometric" in metals, but not quantized
Experimental evidence that nonlinear effects are interesting in Weyls
A quantized effect in Weyl semimetals
Quantized CPGE
What is the "quantum"?
The circular photogalvanic effect in mirror-free 3D-Weyl semimetals is quantized
Conclusions
Q&A
Taught by
International Centre for Theoretical Sciences