Density-dependent spin susceptibility and effective mass in interacting quasi-two-dimensional electron systems

2004/08/31 by Ying Zhang, S. Das Sarma
Materials Science · Physics and Astronomy · #Electronic and Structural Properties of Oxides #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.72.075308

published as Phys. Rev. B 72, 075308 (2005)

openalex publication_date 2005/08/02 · arxiv created 2005/08/29 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Motivated by recent experimental reports, we carry out a Fermi liquid many-body calculation of the interaction induced renormalization of the spin susceptibility and effective mass in realistic two-dimensional (2D) electron systems as a function of carrier density using the leading-order ``ladder-bubble'' expansion in the dynamically screened Coulomb interaction. Using realistic material parameters for various semiconductor-based 2D systems, we find reasonable quantitative agreement with recent experimental susceptibility and effective mass measurements. We point out a number of open questions regarding quantitative aspects of the comparison between theory and experiment in low-density 2D electron systems.

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