2024-03-29T13:36:50Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/457352018-09-13T07:04:41Zcom_10261_2855com_10261_4col_10261_2857
2012-02-16T11:38:26Z
urn:hdl:10261/45735
Josephson Current in Carbon Nanotubes with Spin-Orbit Interaction
Lim, Jong-Soo
López, Rosa
Aguado, Ramón
PACS numbers: 73.63.Fg, 71.70.Ej, 73.63.Kv, 74.45.+c
We demonstrate that curvature-induced spin-orbit coupling induces a 0-π transition in the Josephson current through a carbon nanotube quantum dot coupled to superconducting leads. In the noninteracting regime, the transition can be tuned by applying a parallel magnetic field near the critical field where orbital states become degenerate. Moreover, the interplay between charging and spin-orbit effects in the Coulomb blockade and cotunneling regimes leads to a rich phase diagram with well-defined (analytical) boundaries in parameter space. Finally, the 0 phase always prevails in the Kondo regime. Our calculations are relevant in view of recent experimental advances in transport through ultraclean carbon nanotubes.
2012-02-16T11:38:26Z
2012-02-16T11:38:26Z
2011
artículo
Physical Review Letters 107: 196801 (1-5) (2011)
0031-9007
http://hdl.handle.net/10261/45735
10.1103/PhysRevLett.107.196801
1079-7114
eng
http://dx.doi.org/10.1103/PhysRevLett.107.196801
openAccess
American Physical Society