期刊
PHYSICAL REVIEW LETTERS
卷 85, 期 8, 页码 1730-1733出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.85.1730
关键词
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We study the scattering properties of an interface between a one-dimensional (1D) wire and a two-dimensional (2D) electron gas. Experiments were conducted in the highly controlled geometry provided by molecular bean epitaxy overgrowth onto the cleaved edge of a high quality GaAs/AlGaAs quantum well. Such structures allow for the creation of variable length 1D-2D coupling sections. We find ballistic 1D electron transport through these interaction regions with a mean foe path as long as 6 mu m. Our results explain the origin of the puzzling nonuniversal conductance quantization observed previously in such 1D wires.
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