Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2002-08-23
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
7 pages, 6 figures; to appear in proceedings of ICPS 2002, Edinburgh
Scientific paper
We present detailed experimental studies of the temperature dependence of the plateau conductance of GaAs quantum point contacts in the temperature range from 0.3 K to 10 K. Due to a strong lateral confinement produced by a shallow-etching technique we are able to observe the following unexpected feature: a linear temperature dependence of the measured mid-plateau conductance. We discuss an interpretation in terms of a temperature dependent, intrinsic series resistance, due to non-ballistic effects in the 2D-1D transition region. These results have been reproduced in several samples from different GaAs/GaAlAs heterostructures and observed in different experimental set-ups.
Bruus Henrik
Hansen Eric A.
Kristensen Anders
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