Using a device resembling a nano-charge-coupled-device and measuring the Coulomb blockade, we show how the Coulomb blockade degrades with increasing barrier conductance. To explain this behavior, we identify a new parameter, the “barrier capacitance.” This parameter can be used to elucidate information about the energy barrier under a gate with a size of a few tens of nanometers.
REFERENCES
1.
Hermann
Grabert
and Michel H.
Devoret
, Single Charge Tunneling
(Plenum
, New York
, 1992
), Vol. 294
.2.
Yasuo
Takahashi
, Yukinori
Ono
, Akira
Fujiwara
, and Hiroshi
Inokawa
,J. Phys.: Condens. Matter
14
, R995
(2002
).3.
Akira
Fujiwara
, Neil M.
Zimmerman
, Yukinori
Ono
, and Yasuo
Takahashi
, Appl. Phys. Lett.
84
, 1323
(2004
).4.
Akira
Fujiwara
, Hiroshi
Inokawa
, Kenji
Yamazaki
, Hideo
Namatsu
, Yasuo
Takahashi
, Neil M.
Zimmerman
, and Stuart B.
Martin
, Appl. Phys. Lett.
88
, 053121
(2006
).5.
Hisao
Kawaura
, Toshitsugu
Sakamoto
, and Toshio
Baba
, Appl. Phys. Lett.
36
, 3810
(2000
).6.
Hideyuki
Matsuoka
and Shinichiro
Kimura
, Appl. Phys. Lett.
66
, 613
(1995
).7.
D. H.
Kim
, Appl. Phys. Lett.
79
, 3812
(2001
).8.
Karsten
Flensberg
, Phys. Rev. B
48
, 11156
(1993
).9.
D. V.
Averin
and K. K.
Likharev
, Mesoscopic Phenomena in Solids
(North-Holland
, New York
, 1991
), Vol. 30
, Chap. 6, p. 208
.10.
We note that the island length is approximately and changes by about (or twice that). The gate voltages in Figs. 3 and 4 inset are from the middle LG-C which has very little cross capacitance to the outer edges of the island; this is why the period of the oscillations does not change in Fig. 3 and 4 insets.
© 2006 American Institute of Physics.
2006
American Institute of Physics
You do not currently have access to this content.