Effect of Local Magnetic Moments on the Metallic Behavior in Two Dimensions

Abstract

The temperature dependence of conductivity $\sigma (T)$ in the metallic phase of a two-dimensional electron system in silicon has been studied for different concentrations of local magnetic moments. The local moments have been induced by disorder, and their number was varied using substrate bias. The data suggest that in the limit of $T\to 0$ the metallic behavior, as characterized by $d\sigma /dT<0$, is suppressed by an arbitrarily small amount of scattering by local magnetic moments.

4 pages, revtex, plus four encapsulated postscript figures

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• Temperature-Dependence of the Resistivity of a Dilute 2D Electron System in High Parallel Magnetic Field
• Nonequilibrium Relaxations and Aging Effects in a Two-Dimensional Coulomb Glass
• Critical Behavior of a Strongly Disordered 2D Electron System: The Cases of Long-Range and Screened Coulomb Interactions
• Novel metallic behavior in two dimensions
• Single and Paired Point Defects in a 2D Wigner Crystal
• Effects of a Parallel Magnetic Field on the Metal-Insulator Transition in a Dilute Two-Dimensional Electron System
• The relative importance of electron-electron interactions compared to disorder in the two-dimensional "metallic" state
• In-Plane Magnetodrag between Dilute Two-Dimensional Systems
• Low-Temperature 2D/2D Ohmic Contacts in WSe${}_2$ Field-Effect Transistors as a Platform for the 2D Metal-Insulator Transition
• Two sub-band conductivity of Si quantum well
• Resistivity of the insulating phase approaching the 2D metal-insulator transition: the effect of spin polarization
• Confinement symmetry, mobility anisotropy, and metallic behavior in (311)A GaAs 2D holes
• Electron Mobility and Magneto Transport Study of Ultra-Thin Channel Double-Gate Si MOSFETs
• Magnetic instability and spin-glass order beyond the Anderson-Mott transition in interacting power-law random banded matrix fermions