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Effects of electron interactions at crossings of Zeeman-split subbands in quantum wires
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics .
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics .
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics .
2005 (English)Article in journal (Refereed) Published
Abstract [en]

Recent experimental studies of Zeeman-split one-dimensional subbands in ballistic quantum wires in an in-plane magnetic field show that additional nonquantized conductance structures occur as subbands cross at low electron densities [A. C. Graham et al., Phys. Rev.Lett. 91, 136404 (2003)]. These structures are called 0.7 analogs. We analyze the experimental transconductance data within the Kohn-Sham spin-density-functional method, including exchange and correlation effects for an infinite split-gate quantum wire in a parallel, in-plane magnetic field B∥. Energy levels are found to rearrange abruptly as they cross due to polarization effects driven by exchange and Coulomb interactions. Experimental qualitative features are explained well by this model. ©2005 The American Physical Society.

Place, publisher, year, edition, pages
2005. Vol. 71, no 11, 115303- p.
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Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-28659DOI: 10.1103/PhysRevB.71.115303Local ID: 13816OAI: oai:DiVA.org:liu-28659DiVA: diva2:249470
Available from: 2009-10-09 Created: 2009-10-09 Last updated: 2011-01-12

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Berggren, Karl-FredrikJaksch, PeterYakymenko, Iryna

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