## 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 N electrons approaches its thermodynamic limit slowly, with leading-order corrections scaling as N-1/4. These corrections dominate the extrapolation of the renormalization factor Z and the single-particle effective mass m to the infinite system size. We show how convergence can be improved using analytical corrections. In the range 1≤ rs ≤10, we get a lower renormalization factor Z and a higher effective mass m >m compared to the perturbative random-phase approximation values.

Original language | English (US) |
---|---|

Article number | 041308 |

Journal | Physical Review B - Condensed Matter and Materials Physics |

Volume | 79 |

Issue number | 4 |

DOIs | |

State | Published - Jan 5 2009 |

## ASJC Scopus subject areas

- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics