We have developed the means to grow thin films with unparalleled structural perfection by reactive molecular-beam epitaxy and determined its band gap. Film growth occurs in an adsorption-controlled growth regime. Within this growth window bounded by oxygen pressure and substrate temperature at a fixed bismuth overpressure, single-phase films of the metastable perovskite may be grown by epitaxial stabilization. X-ray diffraction reveals phase-pure and epitaxial films with rocking curve full width at half maximum values as narrow as 11 arc sec (0.003°). Optical absorption measurements reveal that has a direct band gap of .
REFERENCES
1.
W.
Eerenstein
, N. D.
Mathur
, and J. F.
Scott
, Nature (London)
442
, 759
(2006
).2.
N. A.
Hill
and K. M.
Rabe
, Phys. Rev. B
59
, 8759
(1999
).3.
A.
Moreira dos Santos
, A. K.
Cheetham
, W.
Tian
, X.
Pan
, Y.
Jia
, N.
Murphy
, J.
Lettieri
, and D. G.
Schlom
, Appl. Phys. Lett.
84
, 91
(2004
).4.
A.
Sharan
, J.
Lettieri
, Y.
Jia
, W.
Tian
, X.
Pan
, D. G.
Schlom
, and V.
Gopalan
, Phys. Rev. B
69
, 214109
(2004
).5.
J. Y.
Son
and Y. -H.
Shin
, Appl. Phys. Lett.
93
, 062902
(2008
).6.
T.
Atou
, H.
Chiba
, K.
Ohoyama
, Y.
Yamaguchi
, and Y.
Syono
, J. Solid State Chem.
145
, 639
(1999
).7.
A.
Moreira dos Santos
, A. K.
Cheetham
, T.
Atou
, Y.
Syono
, Y.
Yamaguchi
, K.
Ohoyama
, H.
Chiba
, and C. N. R.
Rao
, Phys. Rev. B
66
, 064425
(2002
).8.
K.
Kodama
, S.
Iikubo
, S.
Shamoto
, A. A.
Belik
, and E.
Takayama-Muromachi
, J. Phys. Soc. Jpn.
76
, 124605
(2007
).9.
P.
Baettig
, R.
Seshadri
, and N. A.
Spaldin
, J. Am. Chem. Soc.
129
, 9854
(2007
).10.
A. A.
Belik
, T.
Kolodiazhnyi
, K.
Kosuda
, and E.
Takayama-Muromachi
, J. Mater. Chem.
19
, 1593
(2009
).11.
J. Y.
Tsao
, Materials Fundamentals of Molecular Beam Epitaxy
(Academic
, Boston
, 1993
).12.
D. G.
Schlom
, J. H.
Haeni
, J.
Lettieri
, C. D.
Theis
, W.
Tian
, J. C.
Jiang
, and X. Q.
Pan
, Mater. Sci. Eng., B
87
, 282
(2001
).13.
J. F.
Ihlefeld
, N. J.
Podraza
, Z. K.
Liu
, R. C.
Rai
, X.
Xu
, T.
Heeg
, Y. B.
Chen
, J.
Li
, R. W.
Collins
, J. L.
Musfeldt
, X. Q.
Pan
, J.
Schubert
, R.
Ramesh
, and D. G.
Schlom
, Appl. Phys. Lett.
92
, 142908
(2008
).14.
L.
Kaufman
, CALPHAD: Comput. Coupling Phase Diagrams Thermochem.
25
, 141
(2001
).15.
Scientific Group Thermodata Europe
, in Thermodynamic Properties of Inorganic Materials
, Landolt-Börnstein, New Series, Group IV
Vol. 19
, edited by Lehrstuhl für Theoretische Hüttenkunde
(Springer
, Berlin
, 1999
).16.
Z. G.
Mei
, S.
Shang
, Y.
Wang
, D. G.
Schlom
, and Z. K.
Liu
(unpublished).17.
J. O.
Andersson
, T.
Helander
, L. H.
Hoglund
, P. F.
Shi
, and B.
Sundman
, CALPHAD: Comput. Coupling Phase Diagrams Thermochem.
26
, 273
(2002
).18.
D. G.
Schlom
and J. S. J.
Harris
, in Molecular Beam Epitaxy: Applications to Key Materials
, edited by R. F. C.
Farrow
(Noyes
, Park Ridge, NJ
, 1995
), pp. 505
–622
.19.
G.
Koster
, B. L.
Kropman
, G.
Rijnders
, D. H. A.
Blank
, and H.
Rogalla
, Appl. Phys. Lett.
73
, 2920
(1998
).20.
kSA BandiT, k-Space Associates, Ann Arbor, MI.
21.
S.
Fujino
, M.
Murakami
, S. -H.
Lim
, L. G.
Salamanca-Riba
, M.
Wuttig
, and I.
Takeuchi
, J. Appl. Phys.
101
, 013903
(2007
).22.
The ±0.1 eV error bars on the gap and the background absorption in come from the small film thickness (and the associated challenges in growing films with thicknesses ). Fortunately, they do not obscure the most important physics.
23.
S. R.
Basu
, L. W.
Martin
, Y. H.
Chu
, M.
Gajek
, R.
Ramesh
, R. C.
Rai
, X.
Xu
, and J. L.
Musfeldt
, Appl. Phys. Lett.
92
, 091905
(2008
).24.
A.
Kumar
, R. C.
Rai
, N. J.
Podraza
, S.
Denev
, M.
Ramirez
, Y. -H.
Chu
, L. W.
Martin
, J.
Ihlefeld
, T.
Heeg
, J.
Schubert
, D. G.
Schlom
, J.
Orenstein
, R.
Ramesh
, R. W.
Collins
, J. L.
Musfeldt
, and V.
Gopalan
, Appl. Phys. Lett.
92
, 121915
(2008
).25.
K.
Tobe
, T.
Kimura
, Y.
Okimoto
, and Y.
Tokura
, Phys. Rev. B
64
, 184421
(2001
).26.
M. A.
Quijada
, J. R.
Simpson
, L.
Vasiliu-Doloc
, J. W.
Lynn
, H. D.
Drew
, Y. M.
Mukocskii
, and S. G.
Karabashev
, Phys. Rev. B
64
, 224426
(2001
).27.
M. W.
Kim
, P.
Murugavel
, S.
Parashar
, J. S.
Lee
, and T. W.
Noh
, New J. Phys.
6
, 156
(2004
).28.
N. N.
Kovaleva
, A. V.
Boris
, C.
Bernhard
, A.
Kulakov
, A.
Pimenov
, A. M.
Balbashov
, G.
Khaliullin
, and B.
Keimer
, Phys. Rev. Lett.
93
, 147204
(2004
).29.
R.
Seshadri
and N. A.
Hill
, Chem. Mater.
13
, 2892
(2001
).30.
P.
Baettig
, R.
Seshadri
, and N. A.
Spaldin
, private communication (September 26, 2008
).© 2010 American Institute of Physics.
2010
American Institute of Physics
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