ELFT HÍRADÓ

[Janos Asboth <asboth.janos AT wigner.mta.hu>]

Optics and plasmonics of Dirac and Weyl fermions

*Alexey Belyanin*
Dept of Physics and Astronomy, Texas A&M University

vendéglátó: Kroó Norbert

2017. 05. 29. 10:00, MTA Wigner FK SZFI, I. épület 1. emeleti Tanácsterem

Relativistic Dirac and Weyl fermions were extensively studied in quantum
field theory. Recently they emerged in the nonrelativistic condensed-matter
setting as gapless quasiparticle states in some types of crystals. Notable
examples of 2D systems include graphene and surface states in topological
insulators such as Bi2Se3. Their 3D reincarnation is Dirac and Weyl
semimetals that were recently discovered experimentally. Most of the
research has been focused on their topological properties and electron
transport. However, their optical properties are no less exciting.
Moreover, optical phenomena can provide unique insight into fascinating
physics of these materials. I will discuss several examples illustrating
this point. They include plasmons and normal modes in Weyl semimetals,
nonlinear optical response of graphene and topological insulators,
nonlinear generation of THz plasmons, and optical properties of chiral
Dirac/Weyl fermions in a quantizing magnetic field.


Minden érdeklődőt szívesen látunk!

Asbóth János
szfi-seminar AT wigner.mta.hu