We have developed the combination of an etching and deposition techniques that enables the fabrication of locally gated graphene nanostructures of arbitrary design. Employing this method, we have fabricated graphene nanoconstrictions with local tunable transmission and characterized their electronic properties. An order of magnitude enhanced gate efficiency is achieved adopting the local gate geometry with thin dielectric gate oxide. A complete turn off of the device is demonstrated as a function of the local gate voltage. Such strong suppression of device conductance was found to be due to both quantum confinement and Coulomb blockade effects in the constricted graphene nanostructures.

1.
K. S.
Novoselov
,
A. K.
Geim
,
S. V.
Morozov
,
D.
Jiang
,
Y.
Zhang
,
S. V.
Dubonos
,
I. V.
Grigorieva
, and
A. A.
Firsov
,
Science
306
,
666
(
2004
).
2.
K. S.
Novoselov
,
A. K.
Geim
,
S. V.
Morozov
,
D.
Jiang
,
M. I.
Katsnelson
,
I. V.
Grigorieva
,
S. V.
Dubonos
, and
A. A.
Firsov
Nature (London)
438
,
197
(
2005
).
3.
Y.
Zhang
,
Y. W.
Tan
,
H. L.
Stormer
, and
P.
Kim
,
Nature (London)
438
,
201
(
2005
).
4.
A. K.
Geim
and
K. S.
Novoselov
,
Nat. Mater.
6
,
183
(
2007
).
5.
V. V.
Cheianov
and
V. I.
Fal’ko
,
Phys. Rev. B
74
,
041403
(R) (
2006
).
6.
V. V.
Cheianov
,
V.
Fal’ko
, and
B. L.
Altshuler
,
Science
315
,
1252
(
2007
).
7.
B.
Trauzettel
,
B.
Bulaev
,
D. V.
Loss
, and
G.
Burkard
,
Nat. Phys.
3
,
192
(
2007
).
8.
C.
Berger
,
Z.
Song
,
X.
Li
,
X.
Wu
,
N.
Brown
,
C.
Naud
,
D.
Mayou
,
T.
Li
,
J.
Hass
,
A. N.
Marchenkov
,
E. H.
Conrad
,
P. N.
First
, and
W. A.
de Heer
,
Science
3012
,
1191
(
2006
).
9.
Z.
Chen
,
Y.-M.
Lin
,
M. J.
Rooks
, and
P.
Avouris
, e-print arXiv:cond-mat/0701599.
10.
M. Y.
Han
,
B.
Özyilmaz
,
B. Y.
Zhang
, and
P.
Kim
,
Phys. Rev. Lett.
98
,
206805
(
2007
).
11.
M. C.
Lemme
,
T. J.
Echtermeyer
,
M.
Baus
, and
H.
Kurz
,
IEEE Electron Device Lett.
28
,
282
(
2007
).
12.
B.
Huard
,
J. A.
Sulpizio
,
N.
Stander
,
K.
Todd
,
B.
Yang
, and
D.
Goldhaber-Gordon
,
Phys. Rev. Lett.
98
,
236803
(
2007
).
13.
J. R.
Williams
,
L.
DiCarlo
, and
C. M.
Marcus
,
Science
317
,
638
(
2007
).
14.
A.
Bostwick
,
T.
Ohta
,
T.
Seyller
,
K.
Horn
, and
E.
Rotenberg
,
Nat. Phys.
3
,
36
(
2007
).
15.
M. J.
Biercuk
,
D. J.
Monsma
,
C. M.
Marcus
,
J. S.
Becker
, and
R. G.
Gordon
,
Appl. Phys. Lett.
83
,
2405
(
2003
).
16.
A. C.
Ferrari
,
J. C.
Meyer
,
V.
Scardaci
,
C.
Casiraghi
,
M.
Lazzeri
,
F.
Mauri
,
S.
Piscanec
,
D.
Jiang
,
K. S.
Novoselov
,
S.
Roth
, and
A. K.
Geim
,
Phys. Rev. Lett.
97
,
187401
(
2006
).
17.
F.
Sols
,
F.
Guinea
, and
A. H.
Castro Neto
, e-print arXiv:cond-mat/07053805.
18.
Mesoscopic Electron Transport
, edited by
L. P.
Kouwenhoven
,
L. L.
Sohn
, and
G.
Schoen
,
Proceedings of the NATO Advanced Study Institute
(
Kluwer
,
Dordrecht
,
1997
).
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