Effective mass suppression in a ferromagnetic two-dimensional electron liquid

Abstract

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.

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

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• Contrast between spin and valley degrees of freedom
• Quantum Monte Carlo calculation of the energy band and quasiparticle effective mass of the two-dimensional Fermi fluid
• Diffusion quantum Monte Carlo calculation of the quasiparticle effective mass of the two-dimensional homogeneous electron gas
• Effective Mass and Spin Susceptibility of Dilute Two-Dimensional Holes in GaAs
• $m^{\ast }$ of two-dimensional electron gas: a neural canonical transformation study
• Spin independence of the strongly enhanced effective mass in ultra-clean SiGe/Si/SiGe two-dimensional electron system
• Spin polarization dependence of quasiparticle properties in graphene
• Quantum Monte Carlo study of the quasiparticle effective mass of the two-dimensional uniform electron liquid
• The electron effective mass in the strongly correlated 2D-uniform electron fluid from finite-temperature calculations
• Dynamic correlations in the highly dilute 2D electron liquid: loss function, critical wave vector and analytic plasmon dispersion