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Paper   IPM / Physic / 7723
School of Physics
  Title:   Many-Body Effective Mass Enhancement in a Two-Dimensional Electron Liquid
1.  R. Asgari
2.  B. Davoudi
3.  M. Polini
4.  M.P. Tosi
5.  G.F. Giuliani
6.  G. Vignale
  Status:   In Proceedings
  Proceeding: Proceeding of International Workshop on Condensed Matter Theories (CMT 28), Washington University, St. Louis, Missouri, September 2004, vol. 20, p23-34
  Vol.:  20
  Year:  2006
  Supported by:  IPM
Motivated by a large number of recent experimental reports we have revisited the problem of the microscopic calculation of the many-body effective mass enhancement in an unpolarized two-dimensional electron liquid. Our systematic study is based on the many-body static charge and spin local fields theory . We present results for the many-body effective mass enhancement over a broad range of electron densities. we find confirmation that the inclusion of both charge- and spin-density fluctuations beyond the Random Phase Approximation is indeed crucial to get reasonable agreement with recent measurements.

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