Spin Splitting in Open Quantum Dots

  1. Get@NRC: Spin Splitting in Open Quantum Dots (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1209/epl/i2004-10189-2
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Journal titleEurophysics Letters
Pages261267; # of pages: 7
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 interactions between electrons of opposite spin.
Publication date
AffiliationNational Research Council Canada; NRC Institute for Microstructural Sciences
Peer reviewedNo
NPARC number12743965
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Record identifierd57c1b20-901e-47c9-96e1-475ce5b0f564
Record created2009-10-27
Record modified2016-05-09
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