Micro-Raman spectroscopy is employed to study the phonon confinement in Au- and Mn-catalyzed GaAs and InAs nanowires. The phonon confinement model is used to fit the LO phonon peaks, which also takes into account the contribution to the asymmetry of the line shape due to the presence of surface optical (SO) phonons and structural defects. This also allows us to determine the correlation lengths in these wires, that is the average distance between defects and the defect density in these nanowires. Influence of these defects on the SO phonon is also investigated. A good agreement between the experimental results and the calculations for the SO phonon mode by using the dielectric continuum model is also obtained.
REFERENCES
1.
X.
Duan
, Y.
Huang
, Y.
Cui
, J.
Wang
, and C. M.
Lieber
, Nature (London)
409
, 66
(2001
);J. F.
Wang
, M. S.
Gudiksen
, X. F.
Duan
, Y.
Cui
, and C. M.
Lieber
, Science
293
, 1455
(2001
);
[PubMed]
M. H.
Huang
, S.
Mao
, H.
Feick
, H. Q.
Yan
, Y. Y.
Wu
, H.
Kind
, E.
Weber
, R.
Russo
, and P. D.
Yang
, Science
292
, 1897
(2001
);
[PubMed]
J. C.
Johnson
, H.
Yan
, R. D.
Schaller
, L. H.
Haber
, R. J.
Saykally
, and P.
Yang
, J. Phys. Chem. B
105
, 11387
(2001
).2.
Y.
Li
, F.
Qian
, J.
Xiang
, and C. M.
Lieber
, Mater. Today
9
, 18
(2006
);3.
R. S.
Wagner
and W. C.
Ellis
, Appl. Phys. Lett.
4
, 89
(1964
).4.
K. K.
Tiong
, P. M.
Amirtharaj
, F. H.
Pollak
, and D. E.
Aspnes
, Appl. Phys. Lett.
44
, 122
(1984
).5.
H.
Richter
, Z. P.
Wang
, and L.
Ley
, Solid State Commun.
39
, 625
(1981
).6.
N.
Begum
, M.
Piccin
, F.
Jabeen
, G.
Bais
, S.
Rubini
, F.
Martelli
, and A. S.
Bhatti
, J. Appl. Phys.
104
, 104311
(2008
).7.
A.
Mlayah
, R.
Carles
, G.
Landa
, E.
Bedel
, C.
Fontaine
, and A.
Munoz-Yague
, J. Appl. Phys.
68
, 4777
(1990
).8.
P.
Parayanthal
and F. H.
Pollak
, Phys. Rev. Lett.
52
, 1822
(1984
).9.
A.
Fischer
, L.
Anthony
, and A. D.
Compaan
, Appl. Phys. Lett.
72
, 2559
(1998
).10.
C.
Kittle
, Introduction to Solid State Physics
, 7th ed. (Wiley
, New York
, 2003
), Chap. 4.11.
R.
Ruppin
and R.
Englman
, Rep. Prog. Phys.
33
, 149
(1970
).12.
S.
Ushioda
, A.
Aziza
, J. B.
Valdez
, and G.
Mattei
, Phys. Rev. B
19
, 4012
(1979
).13.
S.
Hayashi
and H.
Kanamori
, Phys. Rev. B
26
, 7079
(1982
).14.
M.
Watt
, C. M.
Sotomayor Torres
, H. E. G.
Arnot
, and S. P.
Beaumont
, Semicond. Sci. Technol.
5
, 285
(1990
).15.
K. W.
Adu
, Q.
Xiong
, H. R.
Gutierrez
, G.
Chen
, and P. C.
Eklund
, Appl. Phys. A: Mater. Sci. Process.
85
, 287
(2006
).16.
D.
Spirkoska
, G.
Abstreiter
, and A.
Fontcuberta i Morral
, Nanotechnology
19
, 435704
(2008
).17.
J.
Chen
, W. Z.
Shen
, J. B.
Wang
, H.
Ogawa
, and Q. X.
Guo
, J. Cryst. Growth
262
, 435
(2004
).18.
M.
Kitajima
, Crit. Rev. Solid State Mater. Sci.
22
, 275
(1997
).19.
F.
Martelli
, S.
Rubini
, M.
Piccin
, G.
Bais
, F.
Jabeen
, S.
De Franceschi
, V.
Grillo
, E.
Carlino
, F.
D’Acapito
, F.
Boscherini
, S.
Cabrini
, M.
Lazzarino
, L.
Businaro
, F.
Romanato
, and A.
Franciosi
, Nano Lett.
6
, 2130
(2006
).20.
S.
Rubini
, M.
Piccin
, G.
Bais
, F.
Jabeen
, F.
Martelli
, and A.
Franciosi
, J. Phys.: Conf. Ser.
61
, 992
(2007
).21.
F.
d’Acapito
, M.
Rovezzi
, F.
Boscherini
, F.
Jabeen
, M.
Piccin
, L.
Felisari
, V.
Grillo
, G.
Bais
, S.
Rubini
, and F.
Martelli
(unpublished).22.
The result of the NWs transfer on the Si support was a large number of wires, some clearly assembled in bundles, others apparently single. The Raman signal has been taken only from the later. The position of the laser spot was then controlled by eye through the microscope. The NW size was well within the laser spot size.
23.
S.
Piscanec
, M.
Cantoro
, A. C.
Ferrari
, J. A.
Zapien
, Y.
Lifshitz
, S. T.
Lee
, S.
Hofmann
, and J.
Robertson
, Phys. Rev. B
68
, 241312
(2003
).24.
M.
Piccin
, G.
Bais
, V.
Grillo
, F.
Jabeen
, S.
De Franceschi
, E.
Carlino
, M.
Lazzarino
, F.
Romanato
, L.
Businaro
, S.
Rubini
, F.
Martelli
, and A.
Franciosi
, Physica E (Amsterdam)
37
, 134
(2007
).25.
Y.
Hao
, G.
Meng
, Z. L.
Wang
, C.
Ye
, and L.
Zhang
, Nano Lett.
6
, 1650
(2006
).26.
B.
Mayer
, Thin Solid Films
221
, 166
(1992
).© 2009 American Institute of Physics.
2009
American Institute of Physics
You do not currently have access to this content.
