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Spin splitting in o...
Spin splitting in open quantum dots
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- Evaldsson, Martin (author)
- Linköpings universitet,Institutionen för teknik och naturvetenskap,Tekniska högskolan
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- Zozoulenko, Igor V. (author)
- Linköpings universitet,Institutionen för teknik och naturvetenskap,Tekniska högskolan
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- Ciorga, M. (author)
- Institute for Microstructural Science, National Research Council K1A 0R6, Ottawa, Canada
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- Zawadzki, P. (author)
- Institute for Microstructural Science, National Research Council K1A 0R6, Ottawa, Canada
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- Sachrajda, A. S. (author)
- Institute for Microstructural Science, National Research Council K1A 0R6, Ottawa, Canada
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(creator_code:org_t)
- 2007-01-02
- 2004
- English.
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In: Europhysics letters. - : IOP Publishing. - 0295-5075 .- 1286-4854. ; 68:2, s. 261-267
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https://doi.org/10.1...
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Abstract
Subject headings
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- We 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.
Keyword
- TECHNOLOGY
- TEKNIKVETENSKAP
Publication and Content Type
- ref (subject category)
- art (subject category)
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