SU(4) Kondo rffect in carbon nanotubes

Manh Soo Choi; Rosa López; Ramón Aguado

doi:10.1103/PhysRevLett.95.067204

SU(4) Kondo rffect in carbon nanotubes

Manh Soo Choi, Rosa López, Ramón Aguado

Department of Physics

Research output: Contribution to journal › Article

120 Citations (Scopus)

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
Article number	067204
Journal	Physical review letters
Volume	95
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevLett.95.067204
Publication status	Published - 2005 Aug 5

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1103/PhysRevLett.95.067204

Fingerprint Dive into the research topics of 'SU(4) Kondo rffect in carbon nanotubes'. Together they form a unique fingerprint.

Cite this

@article{036e7727c72f45aba61a910318e78c5d,

title = "SU(4) Kondo rffect in carbon nanotubes",

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.",

author = "Choi, {Manh Soo} and Rosa L{\'o}pez and Ram{\'o}n Aguado",

year = "2005",

month = aug,

day = "5",

doi = "10.1103/PhysRevLett.95.067204",

language = "English",

volume = "95",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "6",

}

TY - JOUR

T1 - SU(4) Kondo rffect in carbon nanotubes

AU - Choi, Manh Soo

AU - López, Rosa

AU - Aguado, Ramón

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.

UR - http://www.scopus.com/inward/record.url?scp=27144515270&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=27144515270&partnerID=8YFLogxK

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 -