Abstract
We calculate the momentum distribution of the Fermi-liquid phase of the homogeneous two-dimensional electron gas. We show that close to the Fermi surface, the momentum distribution of a finite system with electrons approaches its thermodynamic limit slowly, with leading-order corrections scaling as . These corrections dominate the extrapolation of the renormalization factor and the single-particle effective mass to the infinite system size. We show how convergence can be improved using analytical corrections. In the range , we get a lower renormalization factor and a higher effective mass compared to the perturbative random-phase approximation values.
- Received 16 December 2008
DOI:https://doi.org/10.1103/PhysRevB.79.041308
©2009 American Physical Society