We have measured the temperature dependence of the mobility of the two-dimensional electron gas in AlGaN/GaN heterostructures grown on bulk GaN substrates. The linear dependence of the inverse mobility on temperature at temperatures below 50 K indicates the importance of acoustic phonon scattering in these high mobility heterostructures. Using the temperature dependence of the mobility at a range of carrier densities, we determined the GaN conduction band deformation potential to be This result provides a crucial parameter for accurate calculations of intrinsic mobility limits in AlGaN/GaN heterostructures.
REFERENCES
1.
2.
E. Borovitskaya et al., Proceedings of the MRS Fall Meeting, Boston, MA, 2000 (in press).
3.
4.
M. J.
Manfra
, L. N.
Pfeiffer
, K. W.
West
, H. L.
Stormer
, K. W.
Baldwin
, J. W. P.
Hsu
, D. V.
Lang
, and R. J.
Molnar
, Appl. Phys. Lett.
77
, 2888
(2000
).5.
I. P.
Smorchkova
, C. R.
Elsass
, J. P.
Ibbetson
, R.
Vetury
, B.
Heying
, P.
Fini
, E.
Haus
, S. P.
DenBaars
, J. S.
Speck
, and U. K.
Mishra
, J. Appl. Phys.
86
, 4520
(1999
).6.
E.
Frayssinet
, W.
Knap
, P.
Lorenzini
, N.
Grandjean
, J.
Massies
, C.
Skierbiszewski
, T.
Suski
, I.
Grzegory
, S.
Porowski
, G.
Simin
, X.
Hu
, M. Asif
Khan
, M.
Shur
, R.
Gaska
, and D.
Maude
, Appl. Phys. Lett.
77
, 2551
(2000
).7.
B. Gil (private communication), in Semiconductors and Semimetal, edited by J. I. Pankove and T. D. Moutsakas (Academic, New York, 1999), Vol. 57, p. 209.
8.
9.
M.
Leszczynski
, B.
Beaumont
, E.
Frayssinet
, W.
Knap
, P.
Prystawko
, T.
Suski
, I.
Grzegory
, and S.
Porowski
, Appl. Phys. Lett.
75
, 1
(1999
).10.
N.
Grandjean
, B.
Damilano
, J.
Massies
, G.
Neu
, M.
Teissere
, I.
Grzegory
, S.
Porowski
, M.
Gallart
, P.
Lefebvre
, B.
Gil
, and M.
Albrecht
, J. Appl. Phys.
88
, 183
(2000
).11.
W.
Walukiewicz
, H. E.
Ruda
, J.
Lagowski
, and H. C.
Gatos
, Phys. Rev. B
30
, 4571
(1984
).12.
13.
A. Polian, in Properties, Processing and Application of Gallium Nitride and Related Semiconductors, edited by J. H. Edgar, S. Strite, I. Akasaki, H. Amano, and C. Wetzel (INSPEC, IEEE, London, UK, 1999), Chap. A 1.3, p. 1120;
14.
15.
16.
D. C.
Look
, J. R.
Sizelove
, S.
Keller
, Y. F.
Wu
, U. K.
Mishra
, and S. P.
DenBaars
, Solid State Commun.
102
, 297
(1997
).
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