Epitaxial GaN films of thickness ∼1 μm have been grown on sapphire(0001) and GaAs(001) substrates using the liquid-target pulsed-laser-deposition technique in a 5 Torr nitrogen atmosphere. Detailed x-ray diffraction and photoluminescence studies were carried out for both types of samples. Significantly enhanced low-temperature photoluminescence emissions at 3.368 eV (I3) and 3.310 eV (I4) were observed for the material deposited on a GaAs(001) substrate at ∼800 °C. We propose a model to explain the emission mechanism for both lines in which the electrons and holes are confined in cubic inclusions within the hexagonal material, analogously to a type-I quantum well.

1.
S.
Nakamura
,
T.
Mukai
, and
M.
Senoh
,
Appl. Phys. Lett.
64
,
1687
(
1994
).
Google Scholar
 
2.
J.
Wu
,
H.
Yaguchi
,
K.
Onabe
,
R.
Ito
, and
Y.
Shirake
,
Appl. Phys. Lett.
71
,
2067
(
1997
).
Google Scholar
 
3.
F.
Wildmann
,
G.
Feuillet
,
B.
Daudin
, and
J. L.
Rouviere
,
J. Appl. Phys.
85
,
1550
(
1999
).
Google Scholar
 
4.
S.
Fischer
,
G.
Steude
,
D. M.
Hofman
,
F.
Kurth
, and
F.
Anders
,
J. Cryst. Growth
189/190
,
556
(
1998
).
Google Scholar
 
5.
R. D.
Vispute
,
V.
Talyansky
,
R. P.
Sharma
,
S.
Choopun
,
M.
Downes
, and
T.
Venkatesan
,
Appl. Phys. Lett.
71
,
102
(
1997
).
Google Scholar
 
6.
T. F.
Huang
,
A.
Marshall
,
S.
Spruytte
, and
J. S.
Harris
, Jr.,
J. Cryst. Growth
200
,
362
(
1999
).
Google Scholar
 
7.
K. W.
Mah
,
E.
McGlynn
,
J.
Castro
,
J. G.
Lunney
,
J-P.
Mosnier
,
D.
O’Mahony
, and
M. O.
Henry
,
J. Cryst. Growth
222
,
497
(
2001
).
Google Scholar
 
8.
X. W.
Sun
,
R. F.
Xiao
, and
H. S.
Kwok
,
J. Appl. Phys.
84
,
5776
(
1998
).
Google Scholar
 
9.
R. F.
Xiao
,
X. W.
Sun
,
Z. F.
Li
,
N.
Cue
,
H. S.
Kwok
,
Q. Z.
Liu
, and
S. S.
Lau
,
J. Vac. Sci. Technol. A
15
,
2207
(
1997
).
Google Scholar
 
10.
J. L.
Deiss
,
C.
Hirlimann
,
J. L.
Loison
,
M.
Robino
, and
G.
Versini
,
Mater. Sci. Eng., B
82
,
68
(
2001
).
Google Scholar
 
11.
C. H.
Hong
,
D.
Pavlidis
,
S. W.
Brown
, and
S. C.
Rand
,
J. Appl. Phys.
77
,
1705
(
1995
).
Google Scholar
 
12.
S.
Ruvimov
,
Z.
Weber
,
J.
Washburn
,
T.
Drummond
,
M.
Hafich
, and
S. R.
Lee
,
Appl. Phys. Lett.
71
,
2931
(
1997
).
Google Scholar
 
13.
T.
Kurobe
,
Y.
Sekiguchi
,
J.
Suda
,
M.
Yoshimoto
, and
H.
Matsunami
,
Appl. Phys. Lett.
73
,
2305
(
1998
).
Google Scholar
 
14.
P. G.
Middleton
,
K. P.
O’Donnell
,
C.
Trager-Cowan
,
D.
Cole
,
M.
Cazzanelli
, and
J.
Lunney
,
Mater. Sci. Eng., B
59
,
133
(
1999
).
Google Scholar
 
15.
C.
Wetzel
,
S.
Fischer
,
J.
Kruger
,
E. E.
Haller
,
R. J.
Molnar
,
T. D.
Moustakas
,
E. N.
Mokhov
, and
P. G.
Baranov
,
Appl. Phys. Lett.
68
,
2556
(
1996
).
Google Scholar
 
16.
D. J.
As
,
F.
Schmilgus
,
C.
Wang
,
B.
Schottker
,
D.
Schikora
, and
K.
Lischka
,
Appl. Phys. Lett.
70
,
1311
(
1997
).
Google Scholar
 
17.
M.
Cazzanelli
,
D.
Cole
,
J. F.
Donegan
,
J. G.
Lunney
,
P. G.
Middleton
,
K. P.
Donnel
,
C.
Viegoni
, and
L.
Pavesi
,
Appl. Phys. Lett.
73
,
3390
(
1998
).
Google Scholar
 
18.
K. P.
O’Donnell
,
M.
Umlauf
,
M.
Kraushaar
,
H.
Kalt
, and
O.
Briot
,
Mater. Sci. Eng., B
50
,
264
(
1997
).
Google Scholar
 
19.
P.
Bigenwald
,
P.
Lefebvre
,
T.
Bretagnon
, and
B.
Gil
,
Phys. Status Solidi
216
,
371
(
1999
).
Google Scholar
 
20.
D. J.
As
,
A.
Ruther
,
M.
Lubbers
,
J.
Mimkes
,
K.
Lischka
, and
D.
Schikora
,
Mater. Res. Soc. Symp. Proc.
449
,
615
(
1997
).
Google Scholar
 
21.
H. Clark, Quantum Mechanics (Van Nostrand Reinhold, New York, 1982).
22.
T.
Onitsuka
,
T.
Maruyama
,
K.
Akimoto
, and
Y.
Bando
,
J. Cryst. Growth
189/190
,
295
(
1998
).
Google Scholar
 
23.
D. M.
Eagles
,
J. Phys. Chem. Solids
16
,
76
(
1960
).
Google Scholar
 
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