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Paper   IPM / P / 9530
School of Physics
  Title:   Effective Mass Suppression in a Ferromagnetic Two-Dimensional Electron Liquid
1.  R. Asgari
2.  T . Gokmen
3.  B . Tanatar
4.  M. Padmanabhan
5.  M. Shayegan
  Status:   Published
  Journal: Phys. Rev. B
  Vol.:  79
  Year:  2009
  Pages:   235324
  Supported by:  IPM
We present numerical calculations of the electron effective mass in an interacting, ferromagnetic, two-dimensional electron system. We consider quantum interaction effects associated with the charge-density fluctuation induced many-body vertex corrections. Our theory, which is free of adjustable parameters, reveals that the effective mass is suppressed (relative to its band value) in the strong coupling limit, in good agreement with the results of recent experimental measurements.

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