Abstract
We investigate theoretically the nonequilibrium transport properties of carbon nanotube quantum dots. Owing to the two-dimensional band structure of graphene, a double orbital degeneracy plays the role of a pseudospin, which is entangled with the spin. Quantum fluctuations between these 4 degrees of freedom result in an SU(4) Kondo effect at low temperatures. This exotic Kondo effect manifests as a four-peak splitting in the nonlinear conductance when an axial magnetic field is applied.
Original language | English |
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Article number | 067204 |
Journal | Physical review letters |
Volume | 95 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2005 Aug 5 |
ASJC Scopus subject areas
- Physics and Astronomy(all)