Sökning: WFRF:(Corrêa Gregório B.)
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Raman characterizat...
Raman characterization of single-crystalline Ga0.96Mn0.04As:Zn nanowires realized by ion-implantation
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- Corrêa, Gregório B. (författare)
- Federal Institute Of Education, Science And Technology Of Ceará,Federal University of Pará,Instituto Federal de Educação, Ciência e Tecnologia do Pará, Abaetetuba, PA, Brazil & Programa de Pós-Graduação em Física, Universidade Federal do Pará, Belém, PA, Brazil &
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- Kumar, Sandeep (författare)
- Department of Physics, Central University of Rajasthan, Ajmer, India
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- Paschoal, Waldomiro (författare)
- Federal University of Pará,Programa de Pós-Graduação em Física, Universidade Federal do Pará, Belém, PA, Brazil
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- Devi, Chandni (författare)
- Department of Physics, Central University of Rajasthan, Ajmer, India
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- Jacobsson, Daniel (författare)
- Lund University,Lunds universitet,Centrum för analys och syntes,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Bioteknik,Centrum för tillämpade biovetenskaper,Centre for Analysis and Synthesis,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,Biotechnology,Center for Applied Life Sciences,Faculty of Engineering, LTH,Department of Chemistry, Lund University, Lund, Sweden
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- Johannes, Andreas (författare)
- Institut für Festkörperphysik, Friedrich-Schiller-Universität Jena, Jena, Germany
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- Ronning, Carsten (författare)
- Institut für Festkörperphysik, Friedrich-Schiller-Universität Jena, Jena, Germany
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- Pettersson, Hakan (författare)
- Högskolan i Halmstad,Halmstad University,Lund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,Other operations, LTH,Faculty of Engineering, LTH,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,Akademin för informationsteknologi,Solid State Physics and NanoLund, Lund University, Lund, Sweden
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- Paraguassu, Waldeci (författare)
- Federal University of Pará,Programa de Pós-Graduação em Física, Universidade Federal do Pará, Belém, PA, Brazil
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(creator_code:org_t)
- 2019-05-22
- 2019
- Engelska.
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Ingår i: Nanotechnology. - Bristol : IOP Publishing. - 0957-4484 .- 1361-6528. ; 30:33
- Relaterad länk:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Recent progress in the realization of magnetic GaAs nanowires (NWs) doped with Mn has attracted a lot of attention due to their potential application in spintronics. In this work, we present a detailed Raman investigation of the structural properties of Zn doped GaAs (GaAs:Zn) and Mn-implanted GaAs:Zn (Ga0.96Mn0.04As:Zn) NWs. A significant broadening and redshift of the optical TO and LO phonon modes are observed for these NWs compared to as-grown undoped wires, which is attributed to strain induced by the Zn/Mn doping and to the presence of implantation-related defects. Moreover, the LO phonon modes are strongly damped, which is interpreted in terms of a strong LO phonon-plasmon coupling, induced by the free hole concentration. Moreover, we report on two new interesting Raman phonon modes (191 and 252 cm-1) observed in Mn ion-implanted NWs, which we attribute to Eg (TO) and A1g (LO) vibrational modes in a sheet layer of crystalline arsenic present on the surface of the NWs. This conclusion is supported by fitting the observed Raman shifts for the SO phonon modes to a theoretical dispersion function for a GaAs NW capped with a dielectric shell.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- Mn ion implantation
- nanowires
- Raman spectroscopy
- spintronics
- surface optical phonons
- nanowires
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