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Correlation-induced conductance suppression at level degeneracy in a quantum dot.

Nilsson, Henrik LU ; Karlström, Olov LU ; Larsson, M; Caroff, Philippe LU ; Pedersen, Jonas LU ; Samuelson, Lars LU ; Wacker, Andreas LU ; Wernersson, Lars-Erik LU and Xu, Hongqi LU (2010) In Physical Review Letters 104(18).
Abstract
The large, level-dependent g factors in an InSb nanowire quantum dot allow for the occurrence of a variety of level crossings in the dot. While we observe the standard conductance enhancement in the Coulomb blockade region for aligned levels with different spins due to the Kondo effect, a vanishing of the conductance is found at the alignment of levels with equal spins. This conductance suppression appears as a canyon cutting through the web of direct tunneling lines and an enclosed Coulomb blockade region. In the center of the Coulomb blockade region, we observe the predicted correlation-induced resonance. Our findings are supported by numerical and analytical calculations.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
104
issue
18
publisher
American Physical Society
external identifiers
  • wos:000277417500043
  • pmid:20482198
  • scopus:77951895135
ISSN
1079-7114
DOI
10.1103/PhysRevLett.104.186804
language
English
LU publication?
yes
id
736bcd9e-0b0b-4b67-b18d-1476acac2096 (old id 1610138)
date added to LUP
2010-06-03 14:59:34
date last changed
2018-05-29 09:56:43
@article{736bcd9e-0b0b-4b67-b18d-1476acac2096,
  abstract     = {The large, level-dependent g factors in an InSb nanowire quantum dot allow for the occurrence of a variety of level crossings in the dot. While we observe the standard conductance enhancement in the Coulomb blockade region for aligned levels with different spins due to the Kondo effect, a vanishing of the conductance is found at the alignment of levels with equal spins. This conductance suppression appears as a canyon cutting through the web of direct tunneling lines and an enclosed Coulomb blockade region. In the center of the Coulomb blockade region, we observe the predicted correlation-induced resonance. Our findings are supported by numerical and analytical calculations.},
  articleno    = {186804},
  author       = {Nilsson, Henrik and Karlström, Olov and Larsson, M and Caroff, Philippe and Pedersen, Jonas and Samuelson, Lars and Wacker, Andreas and Wernersson, Lars-Erik and Xu, Hongqi},
  issn         = {1079-7114},
  language     = {eng},
  number       = {18},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Correlation-induced conductance suppression at level degeneracy in a quantum dot.},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.104.186804},
  volume       = {104},
  year         = {2010},
}