We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK


93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Quantum Monte Carlo calculation of the energy b...
View graph of relations

« Back

Quantum Monte Carlo calculation of the energy band and quasiparticle effective mass of the two-dimensional Fermi fluid

Research output: Contribution to journalJournal article


Article number245104
Journal publication date3/12/2009
JournalPhysical Review B
Number of pages8
Original languageEnglish


We have used the diffusion quantum Monte Carlo method to calculate the energy band of the two-dimensional homogeneous electron gas (HEG), and hence we have obtained the quasiparticle effective mass and the occupied bandwidth. We find that the effective mass in the paramagnetic HEG increases significantly when the density is lowered, whereas it decreases in the fully ferromagnetic HEG. Our calculations therefore support the conclusions of recent experimental studies [ Y.-W. Tan et al. Phys. Rev. Lett. 94 016405 (2005); M. Padmanabhan et al. Phys. Rev. Lett. 101 026402 (2008); T. Gokmen et al. Phys. Rev. B 79 195311 (2009)]. We compare our calculated effective masses with other theoretical results and experimental measurements in the literature.

Bibliographic note

© 2009 The American Physical Society