We investigate sequential tunneling through a multilevel quantum dot confining multiple electrons in the regime where several channels are available for transport within the bias window. By analyzing solutions to the master equations of the reduced density matrix, we give general conditions on when the presence of a second transport channel in the bias window quenches transport through the quantum dot. These conditions are in terms of distinct tunneling anisotropies which may aid in explaining the occurrence of negative differential conductance in quantum dots in the nonlinear regime.
REFERENCES
1.
L. P.
Kouwenhoven
, D. G.
Austing
, and S.
Tarucha
, Rep. Prog. Phys.
64
, 701
(2001
).2.
R. C.
Ashoori
, Nature (London)
379
, 413
(1996
).3.
C. W. J.
Beenakker
, Phys. Rev. B
44
, 1646
(1991
).4.
C.
Jacobini
and P.
Lugli
, The Monte Carlo Method for Semiconductor Device Simulations
(Springer-Verlag
, New York
, 1989
).5.
J.
Shah
, Hot Carriers in Semiconductor Nanostructures: Physics and Applications
(Academic
, Boston
, 1992
).6.
E.
Schöll
, Theory of Transport Properties of Semiconductor Nanostructures
(Chapman and Hall
, London
, 1998
).7.
K.
Blum
, Density Matrix Theory and Applications
(Springer
, New York
, 1996
).8.
M. C.
Rogge
, B.
Harke
, C.
Fricke
, F.
Hohls
, M.
Reinwald
, W.
Wegscheider
, and R. J.
Haug
, Phys. Rev. B
72
, 233402
(2005
).9.
M. C.
Rogge
, F.
Cavaliere
, M.
Sassetti
, R. J.
Haug
, and B.
Kramer
, New J. Phys.
8
, 298
(2006
).10.
F.
Cavaliere
, A.
Braggio
, J. T.
Stockburger
, M.
Sassetti
, and B.
Kramer
, Phys. Rev. Lett.
93
, 036803
(2004
).11.
M. H.
Hettler
, H.
Schoeller
, and W.
Wenzel
, Europhys. Lett.
57
, 571
(2002
).12.
A.
Thielmann
, M. H.
Hettler
, J.
Konig
, and G.
Schon
, Phys. Rev. B
71
, 045341
(2005
).13.
L.
Jacak
, P.
Hawrylak
, and A.
Wójs
, Quantum Dots
(Springer-Verlag
, Berlin
, 1998
).14.
J.
Weis
, R. J.
Haug
, K. v.
Klitzing
, and K.
Ploog
, Phys. Rev. Lett.
71
, 4019
(1993
).15.
16.
M.
Toutounji
, J. Chem. Phys.
123
, 244102
(2005
).17.
E. V.
Vaz
, M.S. thesis, Dalhousie University
, 2006
.18.
R.
Hanson
, L. M. K.
Willems Van Beveren
, J. M.
Elzerman
, I. T.
Vink
, and L. P.
Kouwenhoven
, Phys. Rev. B
70
, 241304
(2004
).19.
Y.
Meir
and N. S.
Wingreen
, Phys. Rev. Lett.
68
, 2512
(1992
).20.
A.
Thielmann
, M. H.
Hettler
, J.
Konig
, and G.
Schon
, Phys. Rev. B
68
, 115105
(2003
).21.
A. K.
Hüttel
, H.
Qin
, A. W.
Holleitner
, R. H.
Blick
, K.
Neumaier
, D.
Weinmann
, K.
Eberl
, and P.
Kotthaus
, Europhys. Lett.
62
, 712
(2003
).22.
J.
Kyriakidis
, M.
Pioro-Ladriere
, M.
Ciorga
, A. S.
Sachrajda
, and P.
Hawrylak
, Phys. Rev. B
66
, 035320
(2002
).© 2008 American Institute of Physics.
2008
American Institute of Physics
You do not currently have access to this content.
