141 citations · 450 across the 10 of their papers we have counts for
4 papers · 1 filter
The polaron paradigm: a dual coupling effective band model
Dominic J. J. Marchand, Philip C. E. Stamp, Mona Berciu
Non-diagonal couplings to a bosonic bath completely change polaronic dynamics, from the usual diagonally-coupled paradigm of smoothly-varying properties. We study, using analytic a…
The effect of dispersive optical phonons on the behaviour of a Holstein polaron
Dominic J. J. Marchand, Mona Berciu
We use the approximation-free Bold Diagrammatic Monte Carlo technique to study the effects of a finite dispersion of the optical phonon mode on the properties of the Holstein polar…
Lattice model for the surface states of a topological insulator with applications to magnetic and exciton instabilities
D. J. J. Marchand, M. Franz
A surface of a strong topological insulator (STI) is characterized by an odd number of linearly dispersing gapless electronic surface states. It is well known that such a surface c…
Sharp transition for single polarons in the one-dimensional Su-Schrieffer-Heeger model
D. J. J. Marchand, G. De Filippis, V. Cataudella +5
We study a single polaron in the Su-Schrieffer-Heeger (SSH) model using four different techniques (three numerical and one analytical). Polarons show a smooth crossover from weak t…