We calculated band structures of (11̄00)-oriented GaN with various strains. We found that introducing anisotropic strain in the c plane separates heavy- and light-hole bands. We also found that a tensile strain in the (11̄00) plane makes the light-hole band topmost. These two effects result in a reduction in the density of states at the valence-band edge. In this way we can significantly reduce the transparent carrier density to generate gain.
REFERENCES
1.
S.
Nakamura
, M.
Senoh
, and T.
Mukai
, Appl. Phys. Lett.
62
, 2390
(1993
).2.
I.
Akasaki
, H.
Amano
, S.
Sota
, H.
Sakai
, T.
Tanaka
, and M.
Koike
, Jpn. J. Appl. Phys.
34
, L1517
(1995
).3.
S.
Nakamura
, M.
Senoh
, S.
Nagahama
, N.
Iwasa
, T.
Yamada
, T.
Matsushita
, H.
Kiyoku
, and Y.
Sugimoto
, Jpn. J. Appl. Phys.
35
, L74
(1996
).4.
I.
Akasaki
, S.
Sota
, H
Sakai
, T.
Tanaka
, M.
Koike
, and H.
Amano
, Electron. Lett.
32
, 1105
(1996
).5.
6.
W. W.
Chow
, A.
Knorr
, and S. W.
Koch
, Appl. Phys. Lett.
67
, 754
(1995
).7.
H. Amano and I. Akasaki, in Abstracts of Topical Workshop on III–V Nitrides, Nagoya, 1995.
8.
9.
S.
Kamiyama
, K.
Ohnaka
, M.
Suzuki
, and T.
Uenoyama
, Jpn. J. Appl. Phys.
34
, L821
(1995
).10.
11.
M.
Suzuki
, T.
Uenoyama
, and A.
Yanase
, Phys. Rev. B
52
, 8132
(1995
).12.
13.
14.
15.
K. Horino, A. Kuramata, K. Domen, R. Soejima, and T. Tanahashi, in Proceedings of the International Symposium on Blue Laser and Light Emitting Diodes, We-P32 (Chiba, 1996).
16.
G. L. Bir and G. E. Pikus, Symmetry and Strain-Induced Effects in Semiconductors (Wiley, New York, 1972).
17.
K.
Domen
, K.
Kondo
, A.
Kuramata
, and T.
Tanahashi
, Appl. Phys. Lett.
69
, 94
(1996
).18.
S.
Chichibu
, A.
Shikanai
, T.
Azuhata
, T.
Sota
, A.
Kuramata
, K.
Horino
, and S.
Nakamura
, Appl. Phys. Lett.
68
, 3766
(1996
).19.
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