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Ground-state cooling of a carbon nanomechanical resonator by spin-polarized current

Ground-state cooling of a carbon nanomechanical resonator by spin-polarized current

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STADLER, Pascal, Wolfgang BELZIG, Gianluca RASTELLI, 2014. Ground-state cooling of a carbon nanomechanical resonator by spin-polarized current. In: Physical Review Letters. 113(4), 047201. ISSN 0031-9007. eISSN 1079-7114

@article{Stadler2014Groun-32369, title={Ground-state cooling of a carbon nanomechanical resonator by spin-polarized current}, year={2014}, doi={10.1103/PhysRevLett.113.047201}, number={4}, volume={113}, issn={0031-9007}, journal={Physical Review Letters}, author={Stadler, Pascal and Belzig, Wolfgang and Rastelli, Gianluca}, note={Article Number: 047201} }

<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/123456789/32369"> <dc:creator>Stadler, Pascal</dc:creator> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2015-12-08T10:37:43Z</dcterms:available> <dc:creator>Rastelli, Gianluca</dc:creator> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2015-12-08T10:37:43Z</dc:date> <dc:creator>Belzig, Wolfgang</dc:creator> <dc:language>eng</dc:language> <bibo:uri rdf:resource="https://kops.uni-konstanz.de/handle/123456789/32369"/> <dcterms:title>Ground-state cooling of a carbon nanomechanical resonator by spin-polarized current</dcterms:title> <dc:contributor>Belzig, Wolfgang</dc:contributor> <dcterms:issued>2014</dcterms:issued> <dcterms:abstract xml:lang="eng">We study the nonequilibrium steady state of a mechanical resonator in the quantum regime realized by a suspended carbon nanotube quantum dot in contact with two ferromagnets. Because of the spin-orbit interaction and/or an external magnetic field gradient, the spin on the dot couples directly to the flexural eigenmodes. Accordingly, the nanomechanical motion induces inelastic spin flips of the tunneling electrons. A spin-polarized current at finite bias voltage causes either heating or active cooling of the mechanical modes. We show that maximal cooling is achieved at resonant transport when the energy splitting between two dot levels of opposite spin equals the vibrational frequency. Even for weak electron-resonator coupling and moderate polarizations we can achieve ground-state cooling with a temperature of the leads, for instance, of T=10ω.</dcterms:abstract> <dc:contributor>Rastelli, Gianluca</dc:contributor> <dc:contributor>Stadler, Pascal</dc:contributor> </rdf:Description> </rdf:RDF>

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