The transport property of a lateral two-dimensional paramagnetic diluted magnetic semiconductor electron gas under a spatially periodic magnetic field is investigated theoretically. We find that the electron Fermi velocity along the modulation direction is highly spin dependent even if the spin polarization of the carrier population is negligibly small. It turns out that this spin-polarized Fermi velocity alone can lead to a strong spin polarization of the current, which is still robust against the energy broadening effect induced by the impurity scattering.

1.
G. A.
Prinz
,
Phys. Today
48
,
58
(
1995
);
G. A.
Prinz
,
Science
282
,
1660
(
1998
), and references therein.
[PubMed]
2.
B. E.
Kane
,
Nature (London)
393
,
133
(
1998
);
D.
Loss
and
D. P.
DiVincenzo
,
Phys. Rev. A
57
,
120
(
1998
).
3.
J. C.
Egues
,
Phys. Rev. Lett.
80
,
4578
(
1998
).
4.
R.
Fiederling
,
M.
Keim
,
G.
Reuscher
,
W.
Ossau
,
G.
Schmidt
,
A.
Waag
, and
L. W.
Molenkamp
,
Nature (London)
402
,
787
(
1999
).
5.
J. A.
Folk
,
R. M.
Potok
,
C. M.
Marcus
, and
V.
Umansky
,
Science
299
,
679
(
2003
).
6.
R. M.
Potok
,
J. A.
Folk
,
C. M.
Marcus
, and
V.
Umansky
,
Phys. Rev. Lett.
89
,
266602
(
2002
).
7.
L. P.
Rokhinson
,
V.
Larkina
,
Y. B.
Lyanda-Geller
,
L. N.
Pfeiffer
, and
K. W.
West
,
Phys. Rev. Lett.
93
,
146601
(
2004
).
8.
R. R.
Gerhardts
,
D. D.
Weiss
, and
K. v.
Klitzing
,
Phys. Rev. Lett.
62
,
1173
(
1989
);
[PubMed]
R. W.
Winkler
,
J. P.
Kotthaus
, and
K.
Ploog
,
Phys. Rev. Lett.
62
,
1177
(
1989
);
[PubMed]
C. W. J.
Beenakker
,
Phys. Rev. Lett.
62
,
2020
(
1989
);
[PubMed]
R. R.
Gerhardts
,
Phys. Rev. B
48
,
14416
(
1992
).
9.
C. M.
Hu
,
J.
Nitta
,
A.
Jensen
,
J. B.
Hansen
, and
H.
Takayanagi
,
Phys. Rev. B
63
,
125333
(
2001
).
10.
I. S.
Ibrahim
and
F. M.
Peeters
,
Phys. Rev. B
52
,
17321
(
1995
).
11.
J.
Shi
,
F. M.
Peeters
,
K. W.
Edmonds
, and
B. L.
Gallagher
,
Phys. Rev. B
66
,
035328
(
2002
).
12.
J. M.
Fatah
,
T.
Piorek
,
P.
Harrison
,
T.
Stirner
, and
W. E.
Hagston
,
Phys. Rev. B
49
,
10341
(
1994
).
13.
Physics of II-VI and I-VII Compounds, Semimagnetic Semiconductors
, edited by
O.
Madelung
,
M.
Schulz
, and
H. Weiss
,
Landolt-Börnstein
, New Series, Group III, Vol.
17
, Pt. B (
Springer
, Berlin,
1982
).
14.
S. Lee M.
,
Dobrowolska
,
J. K.
Furdyna
,
H.
Luo
, and
L. R.
Ram-Mahan
,
Phys. Rev. B
54
,
16939
(
1996
).
15.
H.
Jeon
,
J.
Ding
,
W.
Patterson
,
A. V.
Nurmikko
,
W.
Xie
,
D. C.
Grillo
,
M.
Kobayashi
, and
R. L.
Gunshor
,
Appl. Phys. Lett.
59
,
3619
(
1991
).
16.
G.
Grabecki
,
T.
Dietl
,
P.
Sobkowicz
,
J.
Kossut
, and
W.
Zawadzki
,
Appl. Phys. Lett.
45
,
1214
(
1984
).
17.
F. J.
Teran
,
M.
Potemski
,
D. K.
Maude
,
Z.
Wilamowski
,
A. K.
Hassan
,
D.
Plantier
,
J.
Jaroszynski
,
T.
Wojtowicz
, and
G.
Karczewski
,
Physica E (Amsterdam)
17
,
335
(
2003
).
You do not currently have access to this content.