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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 orcid ; 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.
Please use this url to cite or link to this publication:
author
; ; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
104
issue
18
article number
186804
publisher
American Physical Society
external identifiers
  • wos:000277417500043
  • pmid:20482198
  • scopus:77951895135
  • pmid:20482198
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
2016-04-01 10:37:49
date last changed
2023-10-12 10:14:56
@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.}},
  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          = {{https://lup.lub.lu.se/search/files/2005720/1612347.pdf}},
  doi          = {{10.1103/PhysRevLett.104.186804}},
  volume       = {{104}},
  year         = {{2010}},
}