Gate-dependent spin-orbit coupling in multielectron carbon nanotubes
Research output: Contribution to journal › Journal article › Research › peer-review
Documents
- PRL107 gorbSandGrove 2011
Submitted manuscript, 517 KB, PDF document
- PRL107 gorbSandGrove 2011 SuppInfo
Submitted manuscript, 337 KB, PDF document
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.
Original language | English |
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Journal | Nature Physics |
Volume | 7 |
Issue number | 4 |
Pages (from-to) | 348-353 |
ISSN | 1745-2473 |
DOIs | |
Publication status | Published - 1 Apr 2011 |
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