Archiv 2019

Gastgeber: Simone Latini, Angel Rubio

Valley Jahn-Teller effect in Twisted Bilayer Graphene

MPSD Seminar
The surprising insulating and superconducting states of narrow-band graphene twisted bilayers have been mostly discussed so far in terms of strong electron correlation, with little or no attention to phonons and electron-phonon effects. We found that, among the 33492 phonons of a fully relaxed 1.08° twisted bilayer, there are few special, hard, and nearly dispersionless modes that resemble global vibrations of the moiré supercell ('moirè phonons'). [mehr]

Coupled cluster theory with applications to conical intersections and quantum electrodynamics

MPSD Seminar
I will review different aspects of coupled cluster theory with focus on recent developments. In particular, similarity constrained coupled cluster theory1 for conical intersections and nonadiabatic dynamics, pump-probe simulations using time-dependent coupled cluster theory2 and coupled cluster theory for strong light-matter interactions (Cavity QED chemistry).3 [mehr]

Gauge issues in the description of solids with strong light-matter coupling

MPSD Seminar
The rich physics of complex condensed matter systems is largely understood in terms of minimal tight-binding models, which describe interacting electron systems on a lattice with only few valence orbitals per site. To incorporate a strong light-matter coupling into such models, one can project the continuum theory on a given set of valence bands. [mehr]
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