Effective mass suppression in a ferromagnetic two-dimensional electron liquid

2009/02/28 by Reza Asgari, Tayfun Gokmen, T. Gokmen +3
Physics and Astronomy · #Condensed matter physics #Electron #Ferromagnetism #Materials science #Nuclear physics #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.79.235324

published as Phys. Rev. B 79, 235324 (2009) · 5 pages, 4 figures, To appear in Phys. Rev. B

arxiv created 2009/06/03 · openalex publication_date 2009/06/22 · arxiv updated 2015/05/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

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 recent experimental results.

Citations

• Dependence of Effective Mass on Spin and Valley Degrees of Freedom
• Spin-Independent Effective Mass in a Valley-Degenerate Electron System
• Dispersion instability in strongly interacting electron liquids
• Sharp increase of the effective mass near the critical density in a metallic two-dimensional electron system
• Effective mass enhancement in two-dimensional electron systems: the role of interaction and disorder effects