Physics – Condensed Matter – Materials Science
Scientific paper
2010-10-20
Phys. Rev. B 82, 085116 (2010)
Physics
Condensed Matter
Materials Science
15 pages, 14 figures
Scientific paper
We generalize the momentum average approximation to study the properties of single polarons in models with boson affected hopping, where the fermion-boson scattering depends explicitly on both the fermion's and the boson's momentum. As a specific example, we investigate the Edwards fermion-boson model in both one and two dimensions. In one dimension, this allows us to compare our results with exact diagonalization results, to validate the accuracy of our approximation. The generalization to two-dimensional lattices allows us to calculate the polaron's quasiparticle weight and dispersion throughout the Brillouin zone and to demonstrate the importance of Trugman loops in generating a finite effective mass even when the free fermion has an infinite mass.
Berciu Mona
Fehske Holger
No associations
LandOfFree
Momentum average approximation for models with boson-modulated hopping: Role of closed loops in the dynamical generation of a finite quasiparticle mass does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Momentum average approximation for models with boson-modulated hopping: Role of closed loops in the dynamical generation of a finite quasiparticle mass, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Momentum average approximation for models with boson-modulated hopping: Role of closed loops in the dynamical generation of a finite quasiparticle mass will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-717341