Applied Physics Letters · 1998 · 131 citations · 10 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsSemiconductor DevicesSemiconductor MaterialsNanowiresSemiconductor HeterostructuresSemiconductor NanomaterialsSemiconductor PhysicsSemiconductor SurfacesTwo-dimensional SemiconductorsConductanceElectron DensityElectron Density DistributionsModulation DopingNanowire Transport PropertiesQuantum WiresSemiconductor NanowiresTwo-dimensional Semiconductor Heterostructures
We describe quantum wires and point contacts fabricated in GaAs/AlxGa1−xAs heterostructures that are free of the disorder introduced by modulation doping and in which the electron density and the confining potential are separately adjustable by lithographically defined gates. We observe conductance plateaus quantized near even multiples of e2/h in 2 μm wires and up to 15 conductance steps in 5 μm wires at temperatures below 1 K. Near the conductance threshold the quantum point contact and the 2 μm wire both show additional structure below 2e2/h.
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Possible Spin Polarization in a One-Dimensional Electron Gas
K. J. Thomas, J. T. Nicholls, M. Y. Simmons et al. · Physical Review Letters · 1996 · 700 citations · Full text
Nonuniversal Conductance Quantization in Quantum Wires
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