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Electronic energy-loss mechanisms for H, He, and Ne in TiN
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics. Johannes Kepler Univ Linz, Atom Phys & Surface Sci, A-4040 Linz, Austria..
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
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2017 (English)In: Physical Review A: covering atomic, molecular, and optical physics and quantum information, ISSN 2469-9926, E-ISSN 2469-9934, Vol. 96, no 3, 032703Article in journal (Refereed) Published
Abstract [en]

The specific energy loss of medium-energy hydrogen, helium, and neon ions in titanium nitride is studied. Electronic stopping cross sections of ions in the energy range of 3-140 keV/amu weremeasured in backscattering geometry using time-of-flight medium-energy ion scattering, from the energy loss experienced in TiN thin films on Si. For the lowest energies, data for H show a strong deviation from Bragg's rule. For hydrogen and Ne ions, electronic stopping exhibits velocity proportionality at ion velocities below 1 a.u. Comparison to density functional theory calculations of the stopping power yields very good agreement for H, while for He and Ne, the experimentally observed electronic stopping power is considerably higher than predicted. For He the extrapolation of the stopping power at low energies points to a nonvanishing energy loss at vanishing ion velocity. The present data can thus be taken as an indication of additional energy- loss processes different from direct electron-hole pair excitation. Furthermore, the results provide reference values for ion-beam-based analysis of TiN, a material with huge technological relevance.

Place, publisher, year, edition, pages
2017. Vol. 96, no 3, 032703
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Atom and Molecular Physics and Optics Engineering and Technology
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URN: urn:nbn:se:uu:diva-335209DOI: 10.1103/PhysRevA.96.032703ISI: 000409427400007OAI: oai:DiVA.org:uu-335209DiVA: diva2:1162434
Available from: 2017-12-04 Created: 2017-12-04 Last updated: 2017-12-14Bibliographically approved

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Sortica, Mauricio A.Paneta, ValentinaBruckner, BarbaraLohmann, SvenjaNyberg, TomasPrimetzhofer, Daniel

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Physical Review A: covering atomic, molecular, and optical physics and quantum information
Atom and Molecular Physics and OpticsEngineering and Technology

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