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Gate-dependent spin-orbit coupling in multielectron carbon nanotubes.
- Source :
- Nature Physics; Apr2011, Vol. 7 Issue 4, p348-353, 6p, 4 Diagrams
- Publication Year :
- 2011
-
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 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 17452473
- Volume :
- 7
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Nature Physics
- Publication Type :
- Academic Journal
- Accession number :
- 59757821
- Full Text :
- https://doi.org/10.1038/nphys1880