Magnetic-field dependent Hall-effect measurements and mobility spectrum analysis were employed to study anisotropic transport in N-polar heterostructures grown on vicinal sapphire substrates. The significant anisotropy in the mobility in the parallel and perpendicular directions to the miscut direction was accompanied by a slight anisotropy in charge density. A single electron species was found in the direction parallel to the steps resulting from growth on the vicinal substrates; while in the perpendicular direction two distinct electrons peaks were evident at . The lower average mobility in the perpendicular direction is attributed to interface roughness scattering.
REFERENCES
1.
D. F.
Brown
, S.
Rajan
, S.
Keller
, Y. -H.
Hsieh
, S. P.
DenBaars
, and U. K.
Mishra
, Appl. Phys. Lett.
93
, 042104
(2008
).2.
S.
Kolluri
, S.
Keller
, D.
Brown
, G.
Gupta
, S.
Rajan
, S. P.
DenBaars
, and U. K.
Mishra
, J. Appl. Phys.
108
, 074502
(2010
).3.
S.
Keller
, N. A.
Fichtenbaum
, F.
Wu
, D.
Brown
, A.
Rosales
, S. P.
DenBaars
, J. S.
Speck
, and U. K.
Mishra
, J. Appl. Phys.
102
, 083546
(2007
).4.
D. N.
Nath
, S.
Keller
, E.
Hsieh
, S. P.
DenBaars
, U. K.
Mishra
, and S.
Rajan
, Appl. Phys. Lett.
97
, 162106
(2010
).5.
Y.
Tokura
, T.
Saku
, and Y.
Horikoshi
, Phys. Rev. B
53
, R10528
(1996
).6.
Y.
Nakamura
, T.
Noda
, J.
Motohisa
, and H.
Sakaki
, Physica E
8
, 219
(2000
).7.
Z.
Dziuba
and M.
Gorska
, J. Phys. III
2
, 99
(1992
).8.
J.
Antoszewski
, D.
Seymeour
, L.
Faraone
, J. R.
Meyer
, and C. A.
Hoffman
, J. Electron. Mater.
24
, 1255
(1995
).9.
I.
Vurgaftman
, J. R.
Meyer
, C. A.
Hoffman
, D.
Redfern
, J.
Antoszewski
, L.
Faraone
, and J. R.
Lindemuth
, J. Appl. Phys.
84
, 4966
(1998
).10.
S.
Kiatgamolchai
, M.
Myronov
, O. A.
Mironov
, V. G.
Kantser
, E. H. C.
Parker
, and T. E.
Whall
, Phys. Rev. E
66
, 036705
(2002
).11.
D.
Chrastina
, J. P.
Hague
, and D. R.
Leadley
, J. Appl. Phys.
94
, 6583
(2003
).12.
J.
Rothman
, J.
Meilhan
, G.
Perrais
, J. -P.
Belle
, and O.
Gravrand
, J. Electron. Mater.
35
, 1174
(2006
).13.
G. A.
Umana-Membreno
, J.
Antoszewski
, L.
Faraone
, E. P. G.
Smith
, G. M.
Venzor
, S. M.
Johnson
, and V.
Phillips
, J. Electron. Mater.
39
, 1023
(2010
).14.
G. A.
Umana-Membreno
, T.
Stomeo
, V.
Tasco
, A.
Passaseo
, M.
de Vittorio
, and L.
Faraone
, Proceedings of the European Solid-State Device Research Conference (ESSDERC)
, 2010
, pp. 182
–185
.© 2011 American Institute of Physics.
2011
American Institute of Physics
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