Diffusion and ballistic contributions of the interaction correction to the conductivity of a two-dimensional electron gas

Abstract

The results of an experimental study of interaction quantum correction to the conductivity of two-dimensional electron gas in A${}_3$B${}_5$ semiconductor quantum well heterostructures are presented for a wide range of $T\tau$-parameter ($T\tau \simeq 0.03-0.8$), where $\tau$ is the transport relaxation time. A comprehensive analysis of the magnetic field and temperature dependences of the resistivity and the conductivity tensor components allows us to separate the ballistic and diffusion parts of the correction. It is shown that the ballistic part renormalizes in the main the electron mobility, whereas the diffusion part contributes to the diagonal and does not to the off-diagonal component of the conductivity tensor. We have experimentally found the values of the Fermi-liquid parameters describing the electron-electron contribution to the transport coefficients, which are found in a good agreement with the theoretical results.

11 pages, 11 figures

References in corpus (4)

• Quantum corrections to the conductivity and Hall coefficient of a two-dimensional electron gas in a dirty AlGaAs/GaAs/AlGaAs quantum well: from the diffusive to the ballistic regime
• Quantum corrections to the conductivity and Hall coefficient of a 2D electron gas in a dirty AlGaAs/GaAs/AlGaAs quantum well: transition from diffusive to ballistic regime
• Temperature and Magnetic Field Enhanced Hall Slope of a Dilute 2D Hole System in the Ballistic Regime
• Temperature dependent weak field Hall resistance in 2D carrier systems

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• Renormalization of hole-hole interaction at decreasing Drude conductivity
• Probing Landau quantisation with the presence of insulator-quantum Hall transition in a GaAs two-dimensional electron system
• Electron-Electron Interactions in 2D Semiconductor InSe
• Non-monotonic magnetoresistance of two-dimensional electron systems in the ballistic regime
• Disorder and temperature renormalization of interaction contribution to the conductivity in two-dimensional In${}_x$Ga${}_{1-x}$As electron systems
• Simple mechanism that breaks the Hall effect linearity at low temperatures
• Interaction correction to conductivity of Al${}_x$Ga${}_{1-x}$As/GaAs double quantum well heterostructures near the balance
• Insulator, semiclassical oscillations and quantum Hall liquids at low magnetic fields
• Semiclassical theory of the interaction correction to the conductance of antidot arrays
• Interaction correction to the conductivity of two-dimensional electron gas in In${}_x$Ga${}_{1-x}$As/InP quantum well structure with strong spin-orbit coupling
• Metallic behaviour in SOI quantum wells with strong intervalley scattering
• Diffusion conductivity and weak localization in two-dimensional structures with electrostatically induced random antidots array
• Effect of exchange electron-electron interaction on conductivity of InGaAs single and double quantum wells in ballistic regime