Spin Susceptibility of Interacting Two-dimensional Electrons with Anisotropic Effective Mass

Abstract

We report measurements of the spin susceptibility in dilute (rs up to 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, ml and mt. 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 sqrt(ml.mt). Proper treatment of an interacting 2D system with an anisotropic effective mass therefore remains a theoretical challenge.

4 pages, 3 figures, accepted for publication in Phys. Rev. B

References in corpus (18)

• Correlation energy and spin polarization in the 2D electron gas
• Valley susceptibility of an interacting two-dimensional electron system
• Spin Degree of Freedom in a Two-Dimensional Electron Liquid
• The low-density spin susceptibility and effective mass of mobile electrons in Si inversion layers
• Spin Susceptibility of an Ultra-Low Density Two Dimensional Electron System
• Indication of the ferromagnetic instability in a dilute two-dimensional electron system
• Two-dimensional electrons occupying multiple valleys in AlAs
• Scaling of the magnetoconductivity of silicon MOSFET's: evidence for a quantum phase transition in two dimensions
• Spin susceptibility of two-dimensional electrons in narrow AlAs quantum wells
• The thermodynamic spin magnetization of strongly correlated 2d electrons in a silicon inversion layer
• Low-temperature, in situ tunable, uniaxial stress measurements in semiconductors using a piezoelectric actuator
• Role of finite layer thickness in spin-polarization of GaAs 2D electrons in strong parallel magnetic fields
• Effects of thickness on the spin susceptibility of the 2D electron gas
• Dependence of spin susceptibility of a two-dimensional electron system on the valley degree of freedom
• Density dependent spin susceptibility and effective mass in interacting quasi-two dimensional electron systems
• Exchange instabilities in electron systems: Bloch versus Stoner Ferromagnetism
• Giant low-temperature piezoresistance effect in AlAs two-dimensional electrons
• Spin Susceptibility of a 2D Electron System in GaAs towards the Weak Interaction Region

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