We consider a two-channel spin transistor with weak spin-orbit induced interband coupling. We show that the coherent transfer of carriers between the coupled channels gives rise to an additional spin rotation. We calculate the corresponding spin-resolved current in a Datta–Das geometry and show that a weak interband mixing leads to enhanced spin control.

1.
S.
Datta
and
B.
Das
,
Appl. Phys. Lett.
56
,
665
(
1990
).
2.
G.
Meir
,
T.
Matsuyama
, and
U.
Merkt
,
Phys. Rev. B
65
,
125327
(
2002
);
C.-M.
Hu
,
J.
Nitta
,
A.
Jensen
,
J. B.
Hansen
,
H.
Takayanagi
,
T.
Matsuyama
,
D.
Heitmann
, and
U.
Merkt
,
J. Appl. Phys.
91
,
7251
(
2002
).
3.
R.
Fiederling
,
M.
Keim
,
G.
Reuscher
,
W.
Ossau
,
G.
Schmidt
,
A.
Waag
, and
L. W.
Molenkamp
,
Nature (London)
402
,
787
(
1999
);
Y.
Ohno
,
D. K.
Young
,
B.
Beschoten
,
F.
Matsukura
,
H.
Ohno
, and
D. D.
Awschalom
,
Nature (London)
402
,
790
(
1999
).
4.
J. C.
Egues
,
Phys. Rev. Lett.
80
,
4578
(
1998
).
5.
Yu. A.
Bychkov
and
E. I.
Rashba
,
JETP Lett.
39
,
78
(
1984
).
6.
J.
Nitta
,
T.
Akazaki
,
H.
Takayanagi
, and
T.
Enoki
,
Phys. Rev. Lett.
78
,
1335
(
1997
);
G.
Engels
,
J.
Lange
,
Th.
Schäpers
, and
H.
Lüth
,
Phys. Rev. B
55
,
R1958
(
1997
);
D.
Grundler
,
Phys. Rev. Lett.
84
,
6074
(
2000
);
Y.
Sato
,
T.
Kita
,
S.
Gozu
, and
S.
Yamada
,
J. Appl. Phys.
89
,
8017
(
2001
).
7.
N. W. Ashcroft and N. D. Mermin, Solid State Physics (Holt, Rinehart, and Winston, New York, 1976), Chap. 9.
8.
A. V.
Moroz
and
C. H. W.
Barnes
,
Phys. Rev. B
60
,
14272
(
1999
);
F.
Mireles
and
G.
Kirczenow
,
Phys. Rev. B
64
,
024426
(
2001
);
M.
Governale
and
U.
Zülicke
,
Phys. Rev. B
66
,
073311
(
2002
).
9.
E. A.
de Andrada e Silva
,
G. C.
La Rocca
, and
F.
Bassani
,
Phys. Rev. B
55
,
16293
(
1997
);
L. W.
Molenkamp
,
G.
Schmidt
, and
G. E. W.
Bauer
,
Phys. Rev. B
64
,
R121202
(
2001
).
10.
J. C.
Egues
,
G.
Burkard
, and
D.
Loss
,
Phys. Rev. Lett.
89
,
176401
(
2002
).
11.
A.
Bournel
,
P.
Dollfus
,
P.
Bruno
, and
P.
Hesto
,
Eur. Phys. J.: Appl. Phys.
4
,
1
(
1998
).
12.
S. Datta, Electronic Transport in Mesoscopic Systems (Cambridge University Press, Cambridge, 1997), Chap. 2, p. 89.
This content is only available via PDF.
You do not currently have access to this content.