Resistance Noise Scaling in a Dilute Two-Dimensional Hole System in GaAs

Abstract

We have measured the resistance noise of a two-dimensional (2D)hole system in a high mobility GaAs quantum well, around the 2D metal-insulator transition (MIT) at zero magnetic field. The normalized noise power $S_R/R^2$ increases strongly when the hole density p_s is decreased, increases slightly with temperature (T) at the largest densities, and decreases strongly with T at low p_s. The noise scales with the resistance, $S_R/R^2\sim R^{2.4}$, as for a second order phase transition such as a percolation transition. The p_s dependence of the conductivity is consistent with a critical behavior for such a transition, near a density p* which is lower than the observed MIT critical density p_c.

4 pages, 4 figures, to be published in Phys. Rev. Lett

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• 2D Metal-Insulator transition as a percolation transition
• The Observation of Percolation-Induced 2D Metal-Insulator Transition in a Si MOSFET
• Estimating disorder and its adverse effects in semiconductor Majorana nanowires
• Metal-insulator transitions and the effects of electron-electron interactions in two-dimensional electron systems
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• Transport and percolation in a low-density high-mobility two-dimensional hole system
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• Universal density scaling of disorder-limited low-temperature conductivity in high-mobility two-dimensional systems
• Information propagation through quantum chains with fluctuating disorder
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• Anatomy of the quantum melting of the two dimensional Wigner crystal
• Magnetotransport in C-doped AlGaAs heterostructures
• Enhanced Conductance Fluctuation by Quantum Confinement Effect in Graphene Nanoribbons
• The energy scale behind the metallic behaviors in low-density Si-MOSFETs
• Noise at the Wigner Glass Transition
• Microscopic origin of collective exponentially small resistance states
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• Nonlinear Dynamics, Avalanches and Noise for Driven Wigner Crystals
• Radio-frequency reflectometry on large gated 2-dimensional systems
• Anderson localization in doped semiconductors
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• Tuning the Correlation Decay in the Resistance Fluctuations of Multi-Species Networks
• Flicker Noise in Two-Dimensional Electron Gas