Electron-electron interactions in antidot-based Aharonov-Bohm interferometers
2009 (English)In: PHYSICAL REVIEW B, ISSN 1098-0121, Vol. 80, no 11, 115303- p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2009. Vol. 80, no 11, 115303- p.
IdentifiersURN: urn:nbn:se:liu:diva-51265DOI: 10.1103/PhysRevB.80.115303OAI: oai:DiVA.org:liu-51265DiVA: diva2:273904