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Raman Scattering from GaAs Nanowires Grown by Molecular Beam Epitaxy

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Abstract:

Self-assembled nanowires have attracted much attention due to their potential applications in electronics and optoelectronics. A recent interest in Mn catalyzed GaAs nanowires are due to their potential use in spintronic devices at nanoscale. High densities of Au- and Mncatalyzed self-assembled GaAs nanowires (NWs) with diameter in the range of 20 to 200 nm and length of few microns were synthesized by molecular beam epitaxy (MBE) on different substrates at varied substrate temperatures. These nanowires were investigated by means of μ-Raman spectroscopy at room temperature. The Raman spectra from NWs show an energy downshift and a broadening of the LO and TO phonon lines that differ from those of epitaxial GaAs. We suggest that those downshift and broadening are due to the relaxation of the q=0 selection rule in the presence of structural defects in the nanowires. The results indicate that the use of Mn instead of Au as growth catalyst does not affect the structural quality of the nanowires drastically.

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Periodical:

Advanced Materials Research (Volume 31)

Pages:

23-26

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.31.23

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Online since:

November 2007

Authors:

N. Begum, A.S. Bhatti, M. Piccin, G. Bais, F. Jabeen, S. Rubini, F. Martelli, A. Franciosi

Keywords:

Nanowire, phonon modes, Raman Scattering

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© 2008 Trans Tech Publications Ltd. All Rights Reserved

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References

[1] See Nature (news) 441 265 (2006).

Google Scholar

[2] T. Akiyama, K. Nakayama, T. Ito, Phys. Rev. B 73 235308 (2006).

Google Scholar

[3] W. S. Shi, Y. F. Zheng, N. Wang, C. S. Lee, and S. T. Lee, Appl. Phys. Lett. 78, 3304 (2001).

Google Scholar

[4] Roest Aarnoud L, Verheijen Marcel A, Wunnicke Olaf, Serafin Stacey, Wondergem Harry and Bakkers Erik P A M Nanotechnology 17 S271 (2006).

DOI: 10.1088/0957-4484/17/11/s07

Google Scholar

[5] J C Harmand, G. Patriarche, N. Péré-Laperne, M-N. Mérat-Combes, L. Travers and F. Glas Appl. Phys. Lett. 87, 203101 (2005).

DOI: 10.1063/1.2128487

Google Scholar

[6] 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 Letters 6, 2130 (2006).

DOI: 10.1021/nl0607838

Google Scholar

[7] 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, in the press, doi: http: /dx. doi. org/10. 1016/j. physe. 2006. 07. 002.

DOI: 10.1063/1.2729769

Google Scholar

[8] 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).

DOI: 10.1103/physrevb.68.241312

Google Scholar

[9] S. W. da Silva, D. I. Lubyshev, and P. Basmaji, Yu. A. Pusep, P. S. Pizani, and J. C. Galzerani, R. S. Katiyar and G. Morell, J. Appl. Phys. 82, 6247 (1997).

DOI: 10.1063/1.366511

Google Scholar