Gate-dependent spin-orbit coupling in multielectron carbon nanotubes
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Gate-dependent spin-orbit coupling in multielectron carbon nanotubes. / Jespersen, Thomas Sand; Grove-Rasmussen, Kasper; Paaske, Jens; Muraki, K.; Fujisawa, T.; Nygård, Jesper; Flensberg, Karsten.
I: Nature Physics, Bind 7, Nr. 4, 01.04.2011, s. 348-353.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
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 spin–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 spin–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 spin–orbit-split Dirac spectrum of the underlying graphene lattice. Our findings suggest that the spin–orbit coupling is a general property of carbon-nanotube quantum dots, which should provide a unique platform for the study of spin–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 spin–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 spin–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 spin–orbit-split Dirac spectrum of the underlying graphene lattice. Our findings suggest that the spin–orbit coupling is a general property of carbon-nanotube quantum dots, which should provide a unique platform for the study of spin–orbit effects and their applications.
U2 - 10.1038/NPHYS1880
DO - 10.1038/NPHYS1880
M3 - Journal article
VL - 7
SP - 348
EP - 353
JO - Nature Physics
JF - Nature Physics
SN - 1745-2473
IS - 4
ER -
ID: 35346992