The influence of a layer of InAs quantum dots on the transport properties of a nearby two-dimensional electron gas (2DEG) in an InGaAs/InP quantum well is investigated. The probability of the scattering between edge states is found to increase as the distance between the layer of the dots and the 2DEG decreases. It is shown that Coulomb scattering by electrons in the charged quantum dots play an important role in the scattering between edge states. An effect of the electrons in the dots is to mediate scattering between spin-split edge states. This is demonstrated by showing that the overshoot effect in the quantum Hall regime is only present when the dots are charged with electrons.

1.
R. J.
Haug
,
Semicond. Sci. Technol.
8
,
131
(
1993
).
Google Scholar
 
2.
C.
Pfeiffer
,
K. W.
West
,
H. L.
Stormer
, and
K. W.
Baldwin
,
Appl. Phys. Lett.
55
,
1888
(
1989
).
Google Scholar
 
3.
P.
Ramvall
,
N.
Carlsson
,
P.
Omling
,
L.
Samuelson
,
W.
Seifert
,
M.
Stolze
, and
Q.
Wang
,
Appl. Phys. Lett.
68
,
1111
(
1996
).
Google Scholar
 
4.
P.
Ramvall
,
N.
Carlsson
,
P.
Omling
,
L.
Samuelson
,
W.
Seifert
, and
Q.
Wang
,
Appl. Phys. Lett.
70
,
243
(
1997
).
Google Scholar
 
5.
H.
Sakaki
,
G.
Yusa
,
T.
Someya
,
Y.
Ohno
,
T.
Noda
,
H.
Akiyama
,
Y.
Kadoya
, and
H.
Noge
,
Appl. Phys. Lett.
67
,
3444
(
1995
).
Google Scholar
 
6.
G. H.
Kim
,
D. A.
Ritchie
,
M.
Pepper
,
G. D.
Lian
,
J.
Yuan
, and
L. M.
Brown
,
Appl. Phys. Lett.
73
,
2468
(
1998
).
Google Scholar
 
7.
E.
Ribeiro
,
R. D.
Jäggi
,
T.
Heinzel
,
K.
Ensslin
,
G.
Medeiros-Ribeiro
, and
P. M.
Petroff
,
Phys. Rev. Lett.
82
,
996
(
1999
).
Google Scholar
 
8.
A. J.
Shields
,
M. P.
O’Sullivan
,
I.
Farrer
,
D. A.
Ritchie
,
K.
Cooper
,
C. L.
Foden
, and
M.
Pepper
,
Appl. Phys. Lett.
74
,
735
(
1999
).
Google Scholar
 
9.
P.
Omling
,
B.
Meyer
, and
P.
Emanuelsson
,
Appl. Phys. Lett.
58
,
931
(
1991
);
Google Scholar
 
H.
Linke
,
P.
Omling
,
P.
Ramvall
,
B. K.
Meyer
,
M.
Drechsler
,
C.
Wetzel
,
R.
Rudeloff
, and
F.
Scholz
,
J. Appl. Phys.
73
,
7533
(
1993
).
Google Scholar
 
10.
H. Pettersson, C. Pryor, L. Landin, M.-E. Pistol, N. Carlsson, W. Seifert, and L. Samuelson (unpublished).
11.
K.
von Klitzing
,
G.
Dorda
, and
M.
Pepper
,
Phys. Rev. Lett.
45
,
494
(
1980
).
Google Scholar
 
12.
P. L.
McEuen
,
A.
Szafer
,
C. A.
Richter
,
B. W.
Alphenaar
,
J. K.
Jain
,
A. D.
Stone
, and
R. G.
Wheeler
,
Phys. Rev. Lett.
64
,
2062
(
1990
).
Google Scholar
 
13.
C. A.
Richter
,
R. G.
Wheeler
, and
R. N.
Sacks
,
Surf. Sci.
263
,
270
(
1992
).
Google Scholar
 
14.
S.
Komiyama
,
H.
Nii
,
M.
Ohsawa
,
S.
Fukatsu
,
Y.
Shiraki
,
R.
Itoh
, and
H.
Toyoshima
,
Solid State Commun.
80
,
157
(
1991
).
Google Scholar
 
15.
Q. Wang, H. Q. Xu, P. Omling, C. Yang, and K. G. Malmqvist, Semicond. Sci. Technol. (in press).
16.
P.
Ramvall
,
N.
Carlsson
,
P.
Omling
,
L.
Samuelson
,
W.
Seifert
,
Q.
Wang
,
K.
Ishibashi
, and
Y.
Aoyagi
,
J. Appl. Phys.
84
,
2112
(
1998
).
Google Scholar
 
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