Recent discovery of the topological crystalline insulator SnTe has triggered a search for topological superconductors, which have potential application to topological quantum computing. The present work reports on the superconducting properties of indium doped SnTe thin films. The (100) and (111) oriented thin films were epitaxially grown by pulsed-laser deposition on (100) and (111) BaF2 crystalline substrates, respectively. The onset superconducting transition temperatures are about 3.8 K for (100) and 3.6 K for (111) orientations, slightly lower than that of the bulk. Magneto-resistive measurements indicate that these thin films may have upper critical fields higher than that of the bulk. With large surface-to-bulk ratio, superconducting indium doped SnTe thin films provide a rich platform for the study of topological superconductivity and potential device applications based on topological superconductors.

1.
M. Z.
Hasan
and
C. L.
Kane
,
Rev. Mod. Phys.
82
,
3045
(
2010
).
2.
J. E.
Moore
,
Nature (London)
464
,
194
(
2010
).
3.
D.
Xiao
,
W.
Zhu
,
Y.
Ran
,
N.
Nagaosa
, and
S.
Okamoto
,
Nat. Commun.
2
,
596
(
2011
).
4.
S.-Y.
Xu
,
C.
Liu
,
N.
Alidoust
,
M.
Neupane
,
D.
Qian
,
I.
Belopolski
,
J. D.
Denlinger
,
Y. J.
Wang
,
H.
Lin
,
L. A.
Wray
,
G.
Landolt
,
B.
Slomski
,
J. H.
Dil
,
A.
Marcinkova
,
E.
Morosan
,
Q.
Gibson
,
R.
Sankar
,
F. C.
Chou
,
R. J.
Cava
,
A.
Bansil
, and
M. Z.
Hasan
,
Nat. Commun.
3
,
1192
(
2012
).
5.
X.-L.
Qi
and
S.-C.
Zhang
,
Rev. Mod. Phys.
83
,
1057
(
2011
).
6.
L.
Fu
and
C. L.
Kane
,
Phys. Rev. Lett.
100
,
096407
(
2008
).
7.
L.
Fu
and
E.
Berg
,
Phys. Rev. Lett.
105
,
097001
(
2010
).
8.
T. H.
Hsieh
and
L.
Fu
,
Phys. Rev. Lett.
108
,
107005
(
2012
).
9.
S.
Sasaki
,
Z.
Ren
,
A. A.
Taskin
,
K.
Segawa
,
L.
Fu
, and
Y.
Ando
,
Phys. Rev. Lett.
109
,
217004
(
2012
).
11.
T. H.
Hsieh
,
H.
Lin
,
J.
Liu
,
W.
Duan
,
A.
Bansil
, and
L.
Fu
,
Nat. Commun.
3
,
982
(
2012
).
12.
Y.
Tanaka
,
Z.
Ren
,
T.
Sato
,
K.
Nakayama
,
S.
Souma
,
T.
Takahashi
,
K.
Segawa
, and
Y.
Ando
,
Nat. Phys.
8
,
800
(
2012
).
13.
T.
Sato
,
Y.
Tanaka
,
K.
Nakayama
,
S.
Souma
,
T.
Takahashi
,
S.
Sasaki
,
Z.
Ren
,
A. A.
Taskin
,
K.
Segawa
, and
Y.
Ando
,
Phys. Rev. Lett.
110
,
206804
(
2013
).
14.
A. S.
Erickson
,
J.-H.
Chu
,
M. F.
Toney
,
T. H.
Geballe
, and
I. R.
Fisher
,
Phys. Rev. B
79
,
024520
(
2009
).
15.
G.
Balakrishnan
,
L.
Bawden
,
S.
Cavendish
, and
M. R.
Lees
,
Phys. Rev. B
87
,
140507
(
2013
).
16.
R. D.
Zhong
,
J. A.
Schneeloch
,
X. Y.
Shi
,
Z. J.
Xu
,
C.
Zhang
,
J. M.
Tranquada
,
Q.
Li
, and
G. D.
Gu
,
Phys. Rev. B
88
,
020505
(
2013
).
17.
M.
Novak
,
S.
Sasaki
,
M.
Kriener
,
K.
Segawa
, and
Y.
Ando
,
Phys. Rev. B
88
,
140502
(
2013
).
18.
V. K.
Maurya
,
Shruti
,
P.
Srivastava
, and
S.
Patnaik
,
EPL
108
,
37010
(
2014
).
19.
R. D.
Zhong
,
J. A.
Schneeloch
,
T. S.
Liu
,
F. E.
Camino
,
J. M.
Tranquada
, and
G. D.
Gu
,
Phys. Rev. B
90
,
020505
(
2014
).
20.
J.
Shena
and
J. J.
Cha
,
Nanoscale
6
,
14133
(
2014
).
21.
J.
Liu
,
T. H.
Hsieh
,
P.
Wei
,
W.
Duan
,
J.
Moodera
, and
L.
Fu
,
Nat. Matter.
13
,
178
(
2014
).
22.
C.
Fang
,
M. J.
Gilbert
, and
B.
Andrei Bernevig
,
Phys. Rev. Lett.
112
,
046801
(
2014
).
23.
H.
Guo
,
C.-H.
Yan
,
J.-W.
Liu
,
Z.-Y.
Wang
,
R.
Wu
,
Z.-D.
Zhang
,
L.-L.
Wang
,
K.
He
,
X.-C.
Ma
,
S.-H.
Ji
,
W.-H.
Duan
,
X.
Chen
, and
Q.-K.
Xue
,
APL Mater.
2
,
056106
(
2014
).
24.
A. A.
Taskin
,
F.
Yang
,
S.
Sasaki
,
K.
Segawa
, and
Y.
Ando
,
Phys. Rev. B
89
,
121302
(
2014
).
25.
B. A.
Assaf
,
F.
Katmis
,
P.
Wei
,
B.
Satpati
,
Z.
Zhang
,
S. P.
Bennett
,
V. G.
Harris
,
J. S.
Moodera
, and
D.
Heiman
,
Appl. Phys. Lett.
105
,
102108
(
2014
).
26.
N. R.
Werthamer
,
E.
Helfand
, and
P. C.
Hohenberg
,
Phys. Rev.
147
,
295
(
1966
).
You do not currently have access to this content.