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XPS depth profiling of laser-annealed Zn+-implanted GaAs
Bulgarian Academy of Sciences, Sofia.
Bulgarian Academy of Sciences, Sofia.
Bulgarian Academy of Sciences, Sofia.
Universita ‘‘La Sapienza'', Rome.
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1997 (English)In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 109/110, 80-86 p.Article in journal (Refereed) Published
Abstract [en]

Data on the effects of 140 keV Zn+-implantation in (100) GaAs and the consequent low power pulsed laser annealing (LPPLA) on the As/Ga ratio and the chemical states of the elements at the surface and in the subsurface region are presented. The results include the depth distribution of the elements for virgin, as-implanted and implanted+LPPLA [30×(4.5/7.5) MW/cm2] samples. The X-ray photoelectron spectra of as-implanted samples show that a low-intensity Zn 2p peak is observed after 20 min of Ar+ sputtering with an energy of 3 keV, corresponding to about 20 nm of etched material. The depth profiling XPS analysis confirms the ‘recovering' of the stoichiometry of Zn+-implanted specimens after LPPLA with laser pulses of a power density in the energy window of (5–7 MW/cm2). At laser pulse power densities outside of this energy window (4.5 and 7.5 MW/cm2) Zn appears again in the XP spectra after 20 min sputtering as in the case of as-implanted GaAs.

Place, publisher, year, edition, pages
1997. Vol. 109/110, 80-86 p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-62923DOI: 10.1016/S0169-4332(96)00744-1OAI: oai:DiVA.org:liu-62923DiVA: diva2:375124
Available from: 2010-12-07 Created: 2010-12-07 Last updated: 2017-12-11

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Kakanakova-Georgieva, Anelia

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