Spin susceptibility of interacting two-dimensional electrons with anisotropic effective mass

2007/11/08 by Tayfun Gokmen, T. Gokmen, Medini Padmanabhan +7 · 1 citation
Materials Science · Physics and Astronomy · #Anisotropy #Condensed matter physics #Conduction band #Effective mass (spring–mass system) #Electron #Electronic and Structural Properties of Oxides #Isotropy #Monte Carlo method #Physics #Physics of Superconductivity and Magnetism #Quantum Monte Carlo #Quantum and electron transport phenomena #Quantum mechanics #Spin (aerodynamics) #Transverse plane #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevb.76.233301

published as Phys. Rev. B 76, 233301 (2007) · 4 pages, 3 figures, accepted for publication in Phys. Rev. B

arxiv created 2007/11/08 · openalex publication_date 2007/12/10 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We report measurements of the spin susceptibility in dilute (r_s up to \ensuremath≈10) AlAs two-dimensional (2D) electrons occupying a single conduction-band valley with an anisotropic in-plane Fermi contour, characterized by longitudinal and transverse effective masses m_l and m_t. As the density is decreased, the spin susceptibility is significantly enhanced over its band value, reflecting the role of interaction. Yet the enhancement is suppressed compared to the results of quantum Monte Carlo based calculations that take the finite thickness of the electron layer into account but assume an isotropic effective mass equal to √m_l.m_t. Proper treatment of an interacting 2D system with an anisotropic effective mass therefore remains a theoretical challenge.

Citations

• Spin susceptibility of a two-dimensional electron system in GaAs towards the weak interaction region
• Effects of Thickness on the Spin Susceptibility of the Two Dimensional Electron Gas
• Density-dependent spin susceptibility and effective mass in interacting quasi-two-dimensional electron systems
• Dependence of Spin Susceptibility of a Two-Dimensional Electron System on the Valley Degree of Freedom
• Spin Susceptibility of an Ultra-Low-Density Two-Dimensional Electron System
• Low-temperature, in situ tunable, uniaxial stress measurements in semiconductors using a piezoelectric actuator
• Giant low-temperature piezoresistance effect in AlAs two-dimensional electrons
• Indication of the Ferromagnetic Instability in a Dilute Two-Dimensional Electron System
• Thermodynamic spin magnetization of strongly correlated two-dimensional electrons in a silicon inversion layer

Cited by

• Parallel magnetic-field tuning of valley splitting in AlAs two-dimensional electrons