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Electron-electron interactions in antidot-based Aharonov-Bohm interferometers
Simon Fraser University.
Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.
Simon Fraser University.
2009 (engelsk)Inngår i: PHYSICAL REVIEW B, ISSN 1098-0121, Vol. 80, nr 11, s. 115303-Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We present a microscopic picture of quantum transport in quantum antidots in the quantum Hall regime taking electron interactions into account. We discuss the edge state structure, energy-level evolution, charge quantization and linear-response conductance as the magnetic field or gate voltage is varied. Particular attention is given to the conductance oscillations due to Aharonov-Bohm interference and their unexpected periodicity. To explain the latter, we propose the mechanisms of scattering by point defects and Coulomb blockade tunneling. They are supported by self-consistent calculations in the Hartree approximation, which indicate pinning and correlation of the single-particle states at the Fermi energy as well as charge oscillation when antidot-bound states depopulate. We have also found interesting phenomena of antiresonance reflection of the Fano type.

sted, utgiver, år, opplag, sider
2009. Vol. 80, nr 11, s. 115303-
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-51265DOI: 10.1103/PhysRevB.80.115303OAI: oai:DiVA.org:liu-51265DiVA, id: diva2:273904
Tilgjengelig fra: 2009-10-26 Laget: 2009-10-26 Sist oppdatert: 2009-10-26

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