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Physics Colloquium - Dr Sergej Flach

Monday, 20 February 2017 2:46pm

Physics Department
Colloquium

Dr Sergej Flach


Professor

Centre for Theoretical Physics of Complex Systems

Institute for Basic Science

Daejeon, South Korea


"Flat Bands - Designing and Perturbing Flatband Networks"


Certain tight binding lattices host macroscopically degenerate flat spectral bands. Their origin is rooted in local symmetries of the lattice, with destructive interference leading to the existence of compact localized eigenstates. I will present progress in flat band theory and experiments. I will discuss classification principles, flat band generators, surprises in two dimensions, and the impact of perturbations. Finally I will discuss recent progress in the fabrication of semiconductor structures which lead to the observation of flatbands and their corresponding compact localized excitations with exciton-polariton condensates and light.

WHEN: Monday 20 February 2017
WHERE: Room 314, Science 3 Building
TIME: 3.00 pm–4.00 pm

All interested are welcome to attend

Light refreshments to follow in Common Room