Spin-valley blockade in carbon nanotube double quantum dots


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PÁLYI, András, Guido BURKARD, 2010. Spin-valley blockade in carbon nanotube double quantum dots. In: Physical Review B. 82(15). ISSN 1098-0121

@article{Palyi2010Spin--12440, title={Spin-valley blockade in carbon nanotube double quantum dots}, year={2010}, doi={10.1103/PhysRevB.82.155424}, number={15}, volume={82}, issn={1098-0121}, journal={Physical Review B}, author={Pályi, András and Burkard, Guido} }

<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/12440"> <dc:creator>Burkard, Guido</dc:creator> <dc:contributor>Pályi, András</dc:contributor> <dc:creator>Pályi, András</dc:creator> <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/12440"/> <dc:contributor>Burkard, Guido</dc:contributor> <dcterms:rights rdf:resource="http://nbn-resolving.org/urn:nbn:de:bsz:352-20140905103605204-4002607-1"/> <dcterms:issued>2010</dcterms:issued> <dcterms:title>Spin-valley blockade in carbon nanotube double quantum dots</dcterms:title> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-07-12T08:39:32Z</dcterms:available> <dc:language>eng</dc:language> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-07-12T08:39:32Z</dc:date> <dcterms:abstract xml:lang="eng">We present a theoretical study of the Pauli or spin-valley blockade for double quantum dots in semiconducting carbon nanotubes. In our model, we take into account the following characteristic features of carbon nanotubes: (i) fourfold (spin and valley) degeneracy of the quantum-dot levels, (ii) the intrinsic spin-orbit interaction which is enhanced by the tube curvature, and (iii) valley mixing due to short-range disorder, i.e., substitutional atoms, adatoms, etc. We find that the spin-valley blockade can be lifted in the presence of short-range disorder, which induces two independent random (in magnitude and direction) valley-Zeeman fields in the two dots, and hence acts similarly to hyperfine interaction in conventional semiconductor quantum dots. In the case of strong spin-orbit interaction, we identify a parameter regime where the current as the function of an applied axial magnetic field shows a zero-field dip with a width controlled by the interdot tunneling amplitude, in agreement with recent experiments.</dcterms:abstract> <dc:rights>deposit-license</dc:rights> <dcterms:bibliographicCitation>Publ. in: Physical Review B 82 (2010), 15, 155424</dcterms:bibliographicCitation> </rdf:Description> </rdf:RDF>

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