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Transport in cleaved-edge overgrowth wires
- Source :
- Physica E: Low-dimensional Systems and Nanostructures. 9:17-21
- Publication Year :
- 2001
- Publisher :
- Elsevier BV, 2001.
-
Abstract
- We report the results of 3 terminal measurements on a one-dimensional (1D) wire. By utilizing cleaved-edge overgrowth, we were able to vary the coupling between a 1D conductor and an adjacent two-dimensional electron gas (2DEG) strip attached to the central part of the wire. We study the 1D-2DEG coupling by controlling the width of the 2DEG strip. Ballistic transport along the wire persists for interaction regions as long as 6 μm . Thus, with our shortest interaction region (narrowest strip) of 2 μm , the wire remains almost undisturbed by the presence of the nearby 2DEG allowing a true 3 terminal measurement on a clean wire. Our observations also explain the origin of the non-universal conductance quantization of such 1D wires.
Details
- ISSN :
- 13869477
- Volume :
- 9
- Database :
- OpenAIRE
- Journal :
- Physica E: Low-dimensional Systems and Nanostructures
- Accession number :
- edsair.doi...........ef0c400e3ead34e7c3d1aa864b0a78fa