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2D-1D coupling in cleaved edge overgrowth
- Source :
- Physical review letters. 85(8)
- Publication Year :
- 2000
-
Abstract
- 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 free path as long as 6mgr;m. Our results explain the origin of the puzzling nonuniversal conductance quantization observed previously in such 1D wires.
Details
- ISSN :
- 10797114
- Volume :
- 85
- Issue :
- 8
- Database :
- OpenAIRE
- Journal :
- Physical review letters
- Accession number :
- edsair.doi.dedup.....3ef839dd75d1f0a21c4c92ab10e98ad2