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Transport through an array of small ohmic contacts alloyed to the two‐dimensional electron gas of a GaAs/AlGaAs heterostructure
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7.The experiments in Ref. 6 were carried out using an annealer that read temperatures approximately 80 °C higher than those quoted here.
8.The 2DEG in sample A1 is 300 Å below the surface.
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11.The antidots do not need to be entirely depleted, as shown in Ref. 10.
12.The characteristics of the contacted arrays with less than 500 Ω are linear to within 10%–20% over a 100 μA range. The nonlinearity becomes progressively greater with increasing and for samples with kΩ, was measured at an applied voltage of +100 mV.
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