We report on emergence of two-dimensional conduction and ferromagnetism at the interface of MnTe thin films and InP substrates. The MnTe/InP heterostructures grown by molecular-beam epitaxy show thickness-independent sheet conductivity above a critical thickness of about 20 nm, indicating the formation of a conducting layer at the interface. Furthermore, the ferromagnetic behavior is confirmed by both magnetization and anomalous Hall effect measurements below a critical temperature of 270 K. The critical temperature is also independent of the thickness. By the investigation of the atomic structure with transmission electron microscopy, we observe a structural anomaly near the interface which consists of an antiprism-type Mn network unlike a prism-type Mn network of conventional MnTe. The band structure calculation shows that the antiprism-type MnTe can host metallic conduction and ferromagnetism, which is consistent with the present experimental results. The interface engineering based on the chalcogenide compound will develop a new arena for designing the emergent low dimensional conduction and magnetism.

1.
T.
Caillat
,
M.
Carle
,
P.
Pierrat
,
H.
Scherrer
, and
S.
Scherrer
,
J. Phys. Chem. Solids
53
,
1121
(
1992
).
2.
H.
Zhang
,
C.-X.
Liu
,
X.-L.
Qi
,
X.
Dai
,
Z.
Fang
, and
S.-C.
Zhang
,
Nat. Phys.
5
,
438
(
2009
).
3.
Y. L.
Chen
,
J. G.
Analytis
,
J.-H.
Chu
,
Z. K.
Liu
,
S.-K.
Mo
,
X. L.
Qi
,
H. J.
Zhang
,
D. H.
Lu
,
X.
Dai
,
Z.
Fang
,
S. C.
Zhang
,
I. R.
Fisher
,
Z.
Hussain
, and
Z.-X.
Shen
,
Science
325
,
178
(
2009
).
4.
Y.
Xia
,
D.
Qian
,
D.
Hsieh
,
L.
Wray
,
A.
Pal
,
H.
Lin
,
A.
Bansil
,
D.
Grauer
,
Y. S.
Hor
,
R. J.
Cava
, and
M. Z.
Hasan
,
Nat. Phys.
5
,
398
(
2009
).
5.
J.
Zhang
,
C.-Z.
Chang
,
Z.
Zhang
,
J.
Wen
,
X.
Feng
,
K.
Li
,
M.
Liu
,
K.
He
,
L.
Wang
,
X.
Chen
,
Q.-K.
Xue
,
X.
Ma
, and
Y.
Wang
,
Nat. Commun.
2
,
574
(
2011
).
6.
J. A.
Wilson
and
A. D.
Yoffe
,
Adv. Phys.
18
,
193
(
1969
).
7.
H.
Zeng
,
J.
Dai
,
W.
Yao
,
D.
Xiao
, and
X.
Cui
,
Nat. Nanotechnol.
7
,
490
(
2012
).
8.
T.
Cao
,
G.
Wang
,
W.
Han
,
H.
Ye
,
C.
Zhu
,
J.
Shi
,
Q.
Niu
,
P.
Tan
,
E.
Wang
,
B.
Liu
, and
J.
Feng
,
Nat. Commun.
3
,
887
(
2012
).
9.
J. M.
Lu
,
O.
Zheliuk
,
I.
Leermakers
,
N. F. Q.
Yuan
,
U.
Zeitler
,
K. T.
Law
, and
J. T.
Ye
,
Science
350
,
1353
(
2015
).
10.
X.
Qian
,
J.
Liu
,
L.
Fu
, and
J.
Li
,
Science
346
,
1344
(
2014
).
11.
Q.-Y.
Wang
,
Z.
Li
,
W.-H.
Zhang
,
Z.-C.
Zhang
,
J.-S.
Zhang
,
W.
Li
,
H.
Ding
,
Y.-B.
Ou
,
P.
Deng
,
K.
Chang
,
J.
Wen
,
C.-L.
Song
,
K.
He
,
J.-F.
Jia
,
S.-H.
Ji
,
Y.-Y.
Wang
,
L.-L.
Wang
,
X.
Chen
,
X.-C.
Ma
, and
Q.-K.
Xue
,
Chin. Phys. Lett.
29
,
037402
(
2012
).
12.
K.
Ishizaka
,
M. S.
Bahramy
,
H.
Murakawa
,
M.
Sakano
,
T.
Shimojima
,
T.
Sonobe
,
K.
Koizumi
,
S.
Shin
,
H.
Miyahara
,
A.
Kimura
,
K.
Miyamoto
,
T.
Okuda
,
H.
Namatame
,
M.
Taniguchi
,
R.
Arita
,
N.
Nagaosa
,
K.
Kobayashi
,
Y.
Murakami
,
R.
Kumai
,
Y.
Kaneko
,
Y.
Onose
, and
Y.
Tokura
,
Nat. Mater.
10
,
521
(
2011
).
13.
L.
Fu
and
C. L.
Kane
,
Phys. Rev. Lett.
100
,
096407
(
2008
).
14.
Q. L.
He
,
L.
Pan
,
A. L.
Stern
,
E. C.
Burks
,
X.
Che
,
G.
Yin
,
J.
Wang
,
B.
Lian
,
Q.
Zhou
,
E. S.
Choi
,
K.
Murata
,
X.
Kou
,
Z.
Chen
,
T.
Nie
,
Q.
Shao
,
Y.
Fan
,
S.-C.
Zhang
,
K.
Liu
,
J.
Xia
, and
K. L.
Wang
,
Science
357
,
294
(
2017
).
15.
P.
Wei
,
F.
Katmis
,
B. A.
Assaf
,
H.
Steinberg
,
P.
Jarillo-Herrero
,
D.
Heiman
, and
J. S.
Moodera
,
Phys. Rev. Lett.
110
,
186807
(
2013
).
16.
C.-H.
Lee
,
G.-H.
Lee
,
A. M.
van der Zande
,
W.
Chen
,
Y.
Li
,
M.
Han
,
X.
Cui
,
G.
Arefe
,
C.
Nuckolls
,
T. F.
Heinz
,
J.
Guo
,
J.
Hone
, and
P.
Kim
,
Nat. Nanotechnol.
9
,
676
(
2014
).
17.
K.
Momma
and
F.
Izumi
,
J. Appl. Crystallogr.
44
,
1272
(
2011
).
18.
E.
Uchida
,
H.
Kondoh
, and
N.
Fukuoka
,
J. Phys. Soc. Jpn.
11
,
27
(
1956
).
19.
H.
Yadaka
,
T.
Harada
, and
E.
Hirahara
,
J. Phys. Soc. Jpn.
17
,
875
(
1962
).
20.
J. D.
Wasscher
,
Electrical Transport Phenomena in MnTe, an Antiferromagnetic Semiconductor
(
Technische Hogeschool Eindhoven
,
Eindhoven
,
1969
).
21.
Y. B.
Li
,
Y. Q.
Zhang
,
N. K.
Sun
,
Q.
Zhang
,
D.
Li
,
J.
Li
, and
Z. D.
Zhang
,
Phys. Rev. B
72
,
193308
(
2005
).
22.
R. K.
Sharma
,
G.
Singh
,
Y. G.
Shul
, and
H.
Kim
,
Physica B
390
,
314
(
2007
).
23.
24.
T.
Komatsubara
,
M.
Murakami
, and
E.
Hirahara
,
J. Phys. Soc. Jpn.
18
,
356
(
1963
).
25.
K.
Ozawa
,
S.
Anzai
, and
Y.
Hamaguchi
,
Phys. Lett.
20
,
132
(
1966
).
26.
N.
Kunitomi
,
Y.
Hamaguchi
, and
S.
Anzai
,
J. Phys. Paris
25
,
568
(
1964
).
27.
D.
Kriegner
,
H.
Reichlova
,
J.
Grenzer
,
W.
Schmidt
,
E.
Ressouche
,
J.
Godinho
,
T.
Wagner
,
S. Y.
Martin
,
A. B.
Shick
,
V. V.
Volobuev
,
G.
Springholz
,
V.
Holý
,
J.
Wunderlich
,
T.
Jungwirth
, and
K.
Výborný
,
Phys. Rev. B
96
,
214418
(
2017
).
28.
R.
Juza
,
A.
Rabenau
, and
G.
Pascher
,
Z. Anorg. Allg. Chem.
285
,
61
(
1956
).
29.
S. S. A.
Noor
,
J. Appl. Phys.
61
,
3549
(
1987
).
30.
D.
Kriegner
,
K.
Výborný
,
K.
Olejník
,
H.
Reichlová
,
V.
Novák
,
X.
Marti
,
J.
Gazquez
,
V.
Saidl
,
P.
Němec
,
V. V.
Volobuev
,
G.
Springholz
,
V.
Holý
, and
T.
Jungwirth
,
Nat. Commun.
7
,
11623
(
2016
).
31.
Y.
Shon
,
W. C.
Lee
,
Y. S.
Park
,
Y. H.
Kwon
,
S. J.
Lee
,
K. J.
Chung
,
H. S.
Kim
,
D. Y.
Kim
,
D. J.
Fu
,
T. W.
Kang
,
X. J.
Fan
,
Y. J.
Park
, and
H. T.
Oh
,
Appl. Phys. Lett.
84
,
2310
(
2004
).
32.
P.
Poddar
,
Y.
Sahoo
,
H.
Srikanth
, and
P. N.
Prasad
,
Appl. Phys. Lett.
87
,
062506
(
2005
).
33.
P.
Blaha
,
K.
Schwarz
,
G.
Madsen
,
D.
Kvasnicka
, and
J.
Luitz
,
WIEN2K, an Augmented Plane Wave Local Orbitals Program for Calculating Crystal Properties Karlheinz Schwarz
(
Technische Universität Wien
,
Austria
,
2001
).
34.
J. P.
Perdew
,
K.
Burke
, and
M.
Ernzerhof
,
Phys. Rev. Lett.
77
,
3865
(
1996
).
35.
M.
Krause
and
F.
Bechstedt
,
J. Supercond. Novel Magn.
26
,
1963
(
2013
).
36.
J. W.
Allen
,
G.
Lucovsky
, and
J. C.
Mikkelsen
, Jr.
,
Solid State Commun.
24
,
367
(
1977
).

Supplementary Material

You do not currently have access to this content.