## Speaker:

Lee Fisher

## Institution:

LSU

## Time:

Friday, September 13, 2019 - 2:00pm to 3:00pm

## Location:

RH 306

By judiciously constructing local defects in graph models of multi-layer graphene, bound states can be constructed at energies that lie within the continuous spectrum of the associated Schrödinger operator. The layers may be stacked in AA or AB fashion. A necessary condition for this construction is the reducibility of the Fermi surface for the multi-layer structure. This is achieved due to a special reduction of the complex dispersion relation to a function of a single polynomial "composite" function of the quasimomenta.

This is joint work with Wei Li and Stephen Shipman at LSU.