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- Title
Is it the boundaries or disorder that dominates electron transport in semiconductor `billiards'?
- Authors
Micolich, A.P.; See, A.M.; Scannell, B.C.; Marlow, C.A.; Martin, T.P.; Pilgrim, I.; Hamilton, A.R.; Linke, H.; Taylor, R.P.
- Abstract
Semiconductor billiards are often considered as ideal systems for studying dynamical chaos in the quantum mechanical limit. In the traditional picture, once the electron's mean free path, as determined by the mobility, becomes larger than the device, disorder is negligible and electron trajectories are shaped by specular reflection from the billiard walls alone. Experimental insight into the electron dynamics is normally obtained by magnetoconductance measurements. A number of recent experimental studies have shown these measurements to be largely independent of the billiard's exact shape, and highly dependent on sample-to-sample variations in disorder. In this paper, we discuss these more recent findings within the full historical context of work on semiconductor billiards, and offer strong evidence that small-angle scattering at the sub-100 nm length-scale dominates transport in these devices. This has important implications for the role these devices can play for experimental tests of ideas in quantum chaos.
- Subjects
SEMICONDUCTORS; QUANTUM chaos; ELECTRON transport; SPECULAR reflectance; CHAOS theory; QUANTUM theory
- Publication
Fortschritte der Physik / Progress of Physics, 2013, Vol 61, Issue 2/3, p332
- ISSN
0015-8208
- Publication type
Article
- DOI
10.1002/prop.201200081