Spin splitting in open quantum dots

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DOIResolve DOI: http://doi.org/10.1063/1.1994644
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TypeArticle
Proceedings titlePHYSICS OF SEMICONDUCTORS: 27th International Conference on the Physics of Semiconductors - ICPS-27
Series titleAIP Conference Proceedings; no. 772
ConferencePHYSICS OF SEMICONDUCTORS: 27th International Conference on the Physics of Semiconductors, ICPS-27, 26 July 2004 through 30 July 2004, Flagstaff, AZ
ISSN0094-243X
1551-7616
ISBN0735402574
9780735402577
Pages14131414; # of pages: 2
AbstractWe demonstrate that the magnetoconductance of small lateral quantum dots in the strongly-coupled regime (i.e. when the leads can support one or more propagating modes) shows a pronounced splitting of the conductance peaks and dips which persists over a wide range of magnetic fields (from zero field to the edge-state regime) and is virtually independent of the magnetic field strength. Our numerical analysis of the conductance based on the Hubbard Hamiltonian demonstrates that this is essentially a many-body/spin effect that can be traced to a splitting of degenerate levels in the corresponding closed dot. The above effect in open dots can be regarded as a counterpart of the Coulomb blockade effect in weakly coupled dots, with the difference, however, that the splitting of the peaks originates from the interaction between the electrons of opposite spin. © 2005 American Institute of Physics.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Microstructural Sciences
Peer reviewedYes
NPARC number21274633
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Record identifier6a9b4913-ef83-4194-bf83-0665b843f9ba
Record created2015-03-18
Record modified2016-05-09
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