TY - JOUR
T1 - SU(4) Kondo rffect in carbon nanotubes
AU - Choi, Manh Soo
AU - López, Rosa
AU - Aguado, Ramón
N1 - Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2005/8/5
Y1 - 2005/8/5
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.95.067204
DO - 10.1103/PhysRevLett.95.067204
M3 - Article
AN - SCOPUS:27144515270
VL - 95
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 6
M1 - 067204
ER -