SU(2) and SU(4) Kondo effects in carbon nanotube quantum dots

Published

Journal Article

We study the SU(4) Kondo effect in carbon nanotube quantum dots, where doubly degenerate orbitals form four-electron "shells." The SU(4) Kondo behavior is investigated for one, two, and three electrons in the topmost shell. While the Kondo state of two electrons is quenched by a magnetic field, in the case of an odd number of electrons two types of SU(2) Kondo effect may survive. Namely, the spin SU(2) state is realized in a magnetic field parallel to the nanotube (inducing primarily orbital splitting). Application of the perpendicular field (inducing Zeeman splitting) results in the orbital SU(2) Kondo effect. © 2007 The American Physical Society.

Full Text

Duke Authors

Cited Authors

  • Makarovski, A; Zhukov, A; Liu, J; Finkelstein, G

Published Date

  • June 25, 2007

Published In

Volume / Issue

  • 75 / 24

Electronic International Standard Serial Number (EISSN)

  • 1550-235X

International Standard Serial Number (ISSN)

  • 1098-0121

Digital Object Identifier (DOI)

  • 10.1103/PhysRevB.75.241407

Citation Source

  • Scopus