Gate-dependent spin-orbit coupling in multielectron carbon nanotubes

Thomas Sand Jespersen; Kasper Grove-Rasmussen; Jens Paaske; K. Muraki; T. Fujisawa; Jesper Nygård; Karsten Flensberg

doi:10.1038/nphys1880

Gate-dependent spin-orbit coupling in multielectron carbon nanotubes

Thomas Sand Jespersen, Kasper Grove-Rasmussen, Jens Paaske, K. Muraki, T. Fujisawa, Jesper Nygård, Karsten Flensberg

113 Citations (Scopus)

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Abstract

Understanding how the orbital motion of electrons is coupled to the spin degree of freedom in nanoscale systems is central for applications in spin-based electronics and quantum computation. Here we demonstrate such sping-orbit coupling in a carbon-nanotube quantum dot in the general multielectron regime and in the presence of finite disorder. Also, we find a systematic dependence of the sping-orbit coupling on the electron occupation of the quantum dot. Such a dependence has not been seen in any other system and follows from the curvature-induced sping-orbit-split Dirac spectrum of the underlying graphene lattice. Our findings suggest that the sping-orbit coupling is a general property of carbon-nanotube quantum dots, which should provide a unique platform for the study of sping-orbit effects and their applications.

Original language	English
Journal	Nature Physics
Volume	7
Issue number	4
Pages (from-to)	348-353
ISSN	1745-2473
DOIs	https://doi.org/10.1038/nphys1880
Publication status	Published - 1 Apr 2011

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PRL107 gorbSandGrove 2011 SuppInfo Submitted manuscript, 337 KB

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title = "Gate-dependent spin-orbit coupling in multielectron carbon nanotubes",

abstract = "Understanding how the orbital motion of electrons is coupled to the spin degree of freedom in nanoscale systems is central for applications in spin-based electronics and quantum computation. Here we demonstrate such sping-orbit coupling in a carbon-nanotube quantum dot in the general multielectron regime and in the presence of finite disorder. Also, we find a systematic dependence of the sping-orbit coupling on the electron occupation of the quantum dot. Such a dependence has not been seen in any other system and follows from the curvature-induced sping-orbit-split Dirac spectrum of the underlying graphene lattice. Our findings suggest that the sping-orbit coupling is a general property of carbon-nanotube quantum dots, which should provide a unique platform for the study of sping-orbit effects and their applications.",

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T1 - Gate-dependent spin-orbit coupling in multielectron carbon nanotubes

AU - Jespersen, Thomas Sand

AU - Grove-Rasmussen, Kasper

AU - Paaske, Jens

AU - Muraki, K.

AU - Fujisawa, T.

AU - Nygård, Jesper

AU - Flensberg, Karsten

PY - 2011/4/1

Y1 - 2011/4/1

N2 - Understanding how the orbital motion of electrons is coupled to the spin degree of freedom in nanoscale systems is central for applications in spin-based electronics and quantum computation. Here we demonstrate such sping-orbit coupling in a carbon-nanotube quantum dot in the general multielectron regime and in the presence of finite disorder. Also, we find a systematic dependence of the sping-orbit coupling on the electron occupation of the quantum dot. Such a dependence has not been seen in any other system and follows from the curvature-induced sping-orbit-split Dirac spectrum of the underlying graphene lattice. Our findings suggest that the sping-orbit coupling is a general property of carbon-nanotube quantum dots, which should provide a unique platform for the study of sping-orbit effects and their applications.

AB - Understanding how the orbital motion of electrons is coupled to the spin degree of freedom in nanoscale systems is central for applications in spin-based electronics and quantum computation. Here we demonstrate such sping-orbit coupling in a carbon-nanotube quantum dot in the general multielectron regime and in the presence of finite disorder. Also, we find a systematic dependence of the sping-orbit coupling on the electron occupation of the quantum dot. Such a dependence has not been seen in any other system and follows from the curvature-induced sping-orbit-split Dirac spectrum of the underlying graphene lattice. Our findings suggest that the sping-orbit coupling is a general property of carbon-nanotube quantum dots, which should provide a unique platform for the study of sping-orbit effects and their applications.

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JO - Nature Physics

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Gate-dependent spin-orbit coupling in multielectron carbon nanotubes

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