We propose a four-terminal device designed to manipulate by all electrical means the spin of a magnetic adatom positioned at the edge of a quantum spin Hall insulator. We show that an electrical gate, able to tune the interface resistance between a quantum spin Hall insulator and the source and drain electrodes, can switch the device between two regimes: one where the system exhibits spin pumping and the other where the adatom remains in its ground state. This demonstrates an all-electrical route to control single spins by exploiting helical edge states of topological materials.

1.
M. Z.
Hasan
and
C. L.
Kane
,
Rev. Mod. Phys.
82
,
3045
(
2010
).
2.
X.-L.
Qi
and
S.-C.
Zhang
,
Rev. Mod. Phys.
83
,
1057
(
2011
).
3.
D.
Pesin
and
A. H.
MacDonald
,
Nature Mater.
11
,
409
(
2012
).
4.
J.
Maciejko
,
E.-A.
Kim
, and
X.-L.
Qi
,
Phys. Rev. B
82
,
195409
(
2010
).
5.
A. A.
Burkov
and
D. G.
Hawthorn
,
Phys. Rev. Lett.
105
,
066802
(
2010
).
6.
A. J.
Heinrich
,
J. A.
Gupta
,
C. P.
Lutz
, and
D. M.
Eigler
,
Science
306
,
466
(
2004
).
7.
S.
Loth
,
C. P.
Lutz
, and
A. J.
Heinrich
,
Nat. Phys.
6
,
340
(
2010
).
8.
A.
Hurley
,
A.
Narayan
, and
S.
Sanvito
,
Phys. Rev. B
87
,
245410
(
2013
).
9.
C. L.
Kane
and
E. J.
Mele
,
Phys. Rev. Lett.
95
,
226801
(
2005
).
10.
C.-C.
Liu
,
W.
Feng
, and
Y.
Yao
,
Phys. Rev. Lett.
107
,
076802
(
2011
).
11.
Y.
Xu
,
B.
Yan
,
H.-J.
Zhang
,
J.
Wang
,
G.
Xu
,
P.
Tang
,
W.
Duan
, and
S.-C.
Zhang
, e-print arXiv:1306.3008.
12.
A.
Hurley
,
N.
Baadji
, and
S.
Sanvito
,
Phys. Rev. B
84
,
035427
(
2011
).
13.
A.
Hurley
,
N.
Baadji
, and
S.
Sanvito
,
Phys. Rev. B
86
,
125411
(
2012
).
14.
K.
Yosida
,
Theory of Magnetism
(
Springer-Verlag
,
Berlin
,
1998
).
15.
M.
Buttiker
,
Phys. Rev. B
38
,
9375
(
1988
).
16.
S.
Datta
,
Electronic Transport in Mesoscopic Systems
(
Cambridge University Press
,
Cambridge
,
1997
).
17.
A.
Narayan
and
S.
Sanvito
,
Phys. Rev. B
86
,
041104
R
(
2012
).
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