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Electron transport in quantum point contacts: A theoretical study
Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
2011 (English)Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

Electron transport in mesoscopic systems, such as quantum point contacts and Aharonov-Bohm rings are investigated numerically in a tight-binding language with a recursive Green's function algorithm. The simulation reveals among other things the quantized nature of the conductance in point contacts, the Hall conductance, the decreasing sensitivity to scattering impurities in a magnetic field, and the periodic magnetoconductance in an Aharonov-Bohm ring. Furthermore, the probability density distributions for some different setups are mapped, making the transmission coefficients, the quantum Hall effect, and the cyclotron radius visible, where the latter indicates the correspondance between quantum mechanics and classical physics on the mesoscopic scale.

Place, publisher, year, edition, pages
2011. , p. 52
Keywords [en]
quantum point contact, mesoscopic physics, 2DEG, quantized conductance, Aharonov-Bohm, magnetoconductance, recursive Green's function, quantum Hall effect
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:lnu:diva-10771OAI: oai:DiVA.org:lnu-10771DiVA, id: diva2:397458
Subject / course
Physics
Presentation
2011-01-27, Växjö, 15:15 (English)
Uppsok
Physics, Chemistry, Mathematics
Supervisors
Examiners
Available from: 2011-02-15 Created: 2011-02-14 Last updated: 2012-05-24Bibliographically approved

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CiteExportLink to record
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