The role of lead openings in regular mesoscopic billiards

J. P. Bird, D. K. Ferry, R. Akis, R. Newbury, R. P. Taylor, D. M. Olatona, Y. Ochiai, K. Ishibashi, Y. Aoyagi, T. Sugano

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Abstract

We discuss the results of experimental studies of ballistic electron transport in regular (i.e. non-chaotic) quantum dots. At low temperatures, coherent interference between electrons gives rise to reproducible fluctuations in the magneto-resistance, as well as to a weak localization peak near zero field. The lineshape of the peak evolves from a Lorentzian to a linear form, as the leads of the dot are closed, while the fluctuations exhibit striking quasi-periodicity, suggesting that transport through regular dots is dominated by just a small group of trajectories. Simulations show that these characteristics in turn result from the ability of the quantum point contact leads, to strongly select which trajectories participate in transport.

Original languageEnglish (US)
Pages (from-to)286-295
Number of pages10
JournalSuperlattices and Microstructures
Volume20
Issue number3
Publication statusPublished - Oct 1996

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Bird, J. P., Ferry, D. K., Akis, R., Newbury, R., Taylor, R. P., Olatona, D. M., ... Sugano, T. (1996). The role of lead openings in regular mesoscopic billiards. Superlattices and Microstructures, 20(3), 286-295.