Effective mass suppression in a ferromagnetic two-dimensional electron liquid

Details Effective mass suppression in a ferromagnetic two-dimensional electron liquid Effective mass suppression in a ferromagnetic two-dimensional electron liquid

2009-02-19

arxiv.org/abs/0902.3437v2

Phys. Rev. B 79, 235324 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures, To appear in Phys. Rev. B

Scientific paper

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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