This Letter presents fabrication and characterization of an optimized superconducting quantum interference proximity transistor. The present device, characterized by reduced tunnel junction area and shortened normal-metal section, demonstrates no hysteresis at low temperatures as we increased the Josephson inductance of the weak link by decreasing its cross section. It has consequently almost an order of magnitude improved magnetic field responsivity as compared to the earlier design. The modulation of both the current and the voltage across the junction have been measured as a function of magnetic flux piercing the superconducting loop.

1.
P. G.
de Gennes
,
Superconductivity of Metals and Alloys
(
W. A. Benjamin, Inc.
,
New York
,
1966
).
2.
M.
Tinkham
,
Introduction to Superconductivity
, 2nd ed. (
McGraw-Hill
,
New York
,
1996
).
3.
P. G.
de Gennes
,
Rev. Mod. Phys.
36
,
225
(
1964
).
4.
A. I.
Buzdin
,
Rev. Mod. Phys.
77
,
935
(
2005
).
5.
W.
Belzig
,
F. K.
Wilhelm
,
C.
Bruder
,
G.
Schön
, and
A. D.
Zaikin
,
Superlattices Microstruct.
25
,
1251
1288
(
1999
).
6.
B.
Pannetier
and
H.
Courtois
,
J. Low Temp. Phys.
118
,
599
(
2000
).
7.
F.
Zhou
,
P.
Charlat
,
B.
Spivak
, and
B.
Pannetier
,
J. Low Temp. Phys.
110
,
841
843
(
1998
).
8.
F.
Giazotto
,
J. T.
Peltonen
,
M.
Meschke
, and
J. P.
Pekola
,
Nat. Phys.
6
,
254
259
(
2010
).
9.
M.
Meschke
,
J. T.
Peltonen
,
J. P.
Pekola
, and
F.
Giazotto
,
Phys. Rev. B.
84
,
214514
(
2011
).
10.
C. P.
Foley
and
H.
Hilgenkamp
,
Supercond. Sci. Technol.
22
,
064001
(
2009
).
11.
L.
Hao
,
J. C.
Macfarlane
,
S. K. H.
Lam
,
C. P.
Foley
,
P.
Josephs-Franks
, and
J. C.
Gallop
,
IEEE Trans. Appl. Supercond.
15
,
514
517
(
2005
).
12.
L.
Hao
,
J. C.
Macfarlane
,
J. C.
Gallop
,
D.
Cox
,
P.
Joseph-Franks
,
D.
Hutson
, and
J.
Chen
,
IEEE Trans. Instrum. Meas.
56
,
392
395
(
2007
).
13.
A. F.
Andreev
,
Zh. Eksp. Teor. Fiz.
46
,
1823
(
1964
)
A. F.
Andreev
, [
Sov. Phys. JETP
19
,
1228
(
1964
)].
14.
V. T.
Petrashov
,
V. N.
Antonov
,
P.
Delsing
, and
T.
Claeson
,
JETP Lett.
60
,
606
608
(
1994
).
15.
V. T.
Petrashov
,
V. N.
Antonov
,
P.
Delsing
, and
T.
Claeson
,
Phys. Rev. Lett.
74
,
5268
(
1995
).
16.
W.
Belzig
,
R.
Shaikhaidarov
,
V. V.
Petrashov
, and
Yu. V.
Nazarov
,
Phys. Rev. B.
66
,
220505
(
2002
).
17.
M.
Alidoust
,
K.
Halterman
, and
J.
Linder
,
Phys. Rev. B
88
,
075435
(
2013
).
18.
A. V.
Galaktionov
,
A. D.
Zaikin
, and
L. S.
Kuzmin
,
Phys. Rev. B
85
,
224523
(
2012
).
19.
A. V.
Galaktionov
and
A. D.
Zaikin
,
Phys. Rev. B
88
,
104513
(
2013
).
20.
J. Q.
You
and
F.
Nori
,
Nature
474
,
589
(
2011
).
21.
F.
Giazotto
,
T. T.
Heikkilä
,
G.
Pepe
,
P.
Helistö
,
A.
Luukanen
, and
J. P.
Pekola
,
Appl. Phys. Lett.
92
,
162507
(
2008
).
22.
Y.
Blum
,
A.
Tsukernik
,
M.
Karpovski
, and
A.
Palevski
,
Phys. Rev. B
70
,
214501
(
2004
).
23.
P.
Dubos
,
H.
Courtois
,
B.
Pannetier
,
F. K.
Wilhelm
,
A. D.
Zaikin
, and
G.
Schön
,
Phys. Rev. B
63
,
064502
(
2001
).
24.
T. T.
Heikkilä
,
J.
Särkkä
, and
F. K.
Wilhelm
,
Phys. Rev. B
66
,
184513
(
2002
).
25.
G. J.
Dolan
,
Appl. Phys. Lett.
31
,
337
(
1977
).
26.
M.
Nahum
,
T. M.
Eiles
, and
J. M.
Martinis
,
Appl. Phys. Lett.
65
,
3123
(
1994
).
27.
M. M.
Leivo
,
J. P.
Pekola
, and
D. V.
Averin
,
Appl. Phys. Lett.
68
,
1996
(
1996
).
28.
A. M.
Clark
,
A.
Williams
,
S. T.
Ruggiero
,
M. L.
van den Berg
, and
J. N.
Ullom
,
Appl. Phys. Lett.
84
,
625
(
2004
).
29.
J. P.
Pekola
and
J. P.
Kauppinen
,
Cryogenics
34
,
843
(
1994
).
30.
J. J. A.
Baselmans
,
A. F.
Morpurgo
,
B. J.
van Wees
, and
T. M.
Klapwijk
,
Nature
397
,
43
(
1999
).
31.
H.
le Sueur
,
P.
Joyez
,
H.
Pothier
,
C.
Urbina
, and
D.
Esteve
,
Phys. Rev. Lett.
100
,
197002
(
2008
).
32.
H.
Courtois
,
M.
Meschke
,
J. T.
Peltonen
, and
J. P.
Pekola
,
Phys. Rev. Lett.
101
,
067002
(
2008
).
33.
J.
Gallop
,
Supercond. Sci. Technol.
16
,
1575
(
2003
).
34.
M.
Zgirski
,
K. P.
Riikonen
,
V.
Touboltsev
, and
K.
Arutyunov
,
Nano Lett.
5
,
1029
1033
(
2005
).
35.
X. S.
Wu
,
P. W.
Adams
,
Y.
Yang
, and
R. L.
McCarley
,
Phys. Rev. Lett.
96
,
127002
(
2006
).
36.
J. C.
Cuevas
,
J.
Hammer
,
J.
Kopu
,
J. K.
Viljas
, and
M.
Eschrig
,
Phys. Rev. B
73
,
184505
(
2006
).
37.
A.
Ronzani
,
M.
Baillergeau
,
C.
Altimiras
, and
F.
Giazotto
,
Appl. Phys. Lett.
103
,
052603
(
2013
).
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