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Wilhelm RA, Gruber E, Schwestka J, Kozubek R, Madeira TI, Marques JP, Kobus J, Krasheninnikov AV, Schleberger M, Aumayr F. Interatomic Coulombic Decay: The Mechanism for Rapid Deexcitation of Hollow Atoms. PHYSICAL REVIEW LETTERS 2017; 119:103401. [PMID: 28949190 DOI: 10.1103/physrevlett.119.103401] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Indexed: 05/23/2023]
Abstract
The impact of a highly charged ion onto a solid gives rise to charge exchange between the ion and target atoms, so that a slow ion gets neutralized in the vicinity of the surface. Using highly charged Ar and Xe ions and the surface-only material graphene as a target, we show that the neutralization and deexcitation of the ions proceeds on a sub-10 fs time scale. We further demonstrate that a multiple Interatomic Coulombic Decay (ICD) model can describe the observed ultrafast deexcitation. Other deexcitation mechanisms involving nonradiative decay and quasimolecular orbital formation during the impact are not important, as follows from the comparison of our experimental data with the results of first-principles calculations. Our method also enables the estimation of ICD rates directly.
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Affiliation(s)
- Richard A Wilhelm
- TU Wien, Institute of Applied Physics, Wiedner Hauptstrasse 8-10, 1040 Vienna, Austria, EU
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Bautzner Landstrasse 400, 01328 Dresden, Germany, EU
| | - Elisabeth Gruber
- TU Wien, Institute of Applied Physics, Wiedner Hauptstrasse 8-10, 1040 Vienna, Austria, EU
| | - Janine Schwestka
- TU Wien, Institute of Applied Physics, Wiedner Hauptstrasse 8-10, 1040 Vienna, Austria, EU
| | - Roland Kozubek
- University Duisburg-Essen, Faculty of Physics and CENIDE, Lotharstrasse 1, 47048 Duisburg, Germany, EU
| | - Teresa I Madeira
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Bautzner Landstrasse 400, 01328 Dresden, Germany, EU
| | - José P Marques
- BioISI-Biosystems & Integrative Sciences Institute, Faculdade de Ciéncias da Universidade de Lisboa, 1749-016 Lisbon, Portugal, EU
| | - Jacek Kobus
- Nicolaus Copernicus University, Faculty of Physics, Astronomy and Informatics, Institute of Physics, Grudziądzka 5, 87-100 Toruń, Poland, EU
| | - Arkady V Krasheninnikov
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Bautzner Landstrasse 400, 01328 Dresden, Germany, EU
| | - Marika Schleberger
- University Duisburg-Essen, Faculty of Physics and CENIDE, Lotharstrasse 1, 47048 Duisburg, Germany, EU
| | - Friedrich Aumayr
- TU Wien, Institute of Applied Physics, Wiedner Hauptstrasse 8-10, 1040 Vienna, Austria, EU
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Facsko S, Heller R, El-Said AS, Meissl W, Aumayr F. Surface nanostructures by single highly charged ions. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2009; 21:224012. [PMID: 21715750 DOI: 10.1088/0953-8984/21/22/224012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
It has recently been demonstrated that the impact of individual, slow but highly charged ions on various surfaces can induce surface modifications with nanometer dimensions. Generally, the size of these surface modifications (blisters, hillocks, craters or pits) increases dramatically with the potential energy of the highly charged ion, while the kinetic energy of the projectile ions seems to be of little importance. This paper presents the currently available experimental evidence and theoretical models and discusses the circumstances and conditions under which nanosized features on different surfaces due to the impact of slow highly charged ions can be produced.
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Affiliation(s)
- S Facsko
- Institut für Ionenstrahlphysik und Materialforschung, Forschungszentrum Dresden-Rossendorf, D-01328 Dresden, Germany
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Kost D, Facsko S, Möller W, Hellhammer R, Stolterfoht N. Channels of potential energy dissipation during multiply charged argon-ion bombardment of copper. PHYSICAL REVIEW LETTERS 2007; 98:225503. [PMID: 17677857 DOI: 10.1103/physrevlett.98.225503] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2007] [Indexed: 05/16/2023]
Abstract
The dissipation of potential energy of multiply charged Ar ions incident on Cu has been studied by complementary electron spectroscopy and calorimetry at charge states between 2 and 10 and kinetic energies between 100 eV and 1 keV. The emitted and deposited fractions of potential energy increase at increasing charge state, showing a significant jump for charge states q>8 due to the presence of L-shell vacancies in the ion. Both fractions balance the total potential energy, thus rendering former hypotheses of a significant deficit of potential energy obsolete. The experimental data are reproduced by computer simulations based on the extended dynamic classical-over-the-barrier model.
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Affiliation(s)
- D Kost
- Institute of Ion Beam Physics and Materials Research, Forschungszentrum Dresden-Rossendorf, 01314 Dresden, Germany
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5
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Facsko S, Kost D, Keller A, Möller W, Pešić Z, Stolterfoht N. Interaction of highly charged ions with insulator surfaces. Radiat Phys Chem Oxf Engl 1993 2007. [DOI: 10.1016/j.radphyschem.2005.09.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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6
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Unipan M, Robin A, Morgenstern R, Hoekstra R. Local spin polarization at surfaces probed by hollow atoms. PHYSICAL REVIEW LETTERS 2006; 96:177601. [PMID: 16712330 DOI: 10.1103/physrevlett.96.177601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2005] [Indexed: 05/09/2023]
Abstract
The relaxation of hollow atoms produced by slow multiply charged ions impinging on surfaces produces characteristic Auger electron spectra. These spectra, which serve as fingerprints of the interaction, can be used to probe local spin ordering at surfaces by relating changes in the intensities of different spin states to local spin polarization at the surface. The area from which the electrons are captured is of the order of a few Angstrom(2), only. The potential of the method is illustrated by He(2+) and N(6+) ions interacting with a ferromagnetic Ni(110) crystal. From the Auger spectra we determine a spin polarization of approximately 90% at room temperature.
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Affiliation(s)
- M Unipan
- KVI Atomic Physics, Rijksuniversiteit Groningen, The Netherlands
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8
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Pfandzelter R, Bernhard T, Winter H. Spin-polarized electrons in collisions of multicharged nitrogen ions with a magnetized Fe(001) surface. PHYSICAL REVIEW LETTERS 2001; 86:4152-4155. [PMID: 11328118 DOI: 10.1103/physrevlett.86.4152] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2000] [Indexed: 05/23/2023]
Abstract
We report on the first spin-resolved energy spectra for the emission of electrons during grazing scattering of 150 keV multicharged nitrogen ions from a magnetized Fe(001) surface. A substantial spin polarization for KLL Auger electrons emitted in the final stage of the neutralization sequence during the interaction of multicharged ions with a metal surface is observed. We conclude from our data that the projectile L shell is dominantly populated by electrons from the conduction band of the target. For low energy electrons we find an increase of their spin polarization with an increase of the projectile charge.
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Affiliation(s)
- R Pfandzelter
- Institut für Physik der Humboldt, Universität zu Berlin, Invalidenstrasse 110, D-10115 Berlin, Germany
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9
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Frémont F, Bedouet C, Chesnel JY, Merabet H, Husson X, Grether M, Spieler A, Stolterfoht N. Experimental evidence for dielectronic excitation producing Ne K vacancies in 35-keV N7++Ne collisions. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1996; 54:R4609-R4612. [PMID: 9914129 DOI: 10.1103/physreva.54.r4609] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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10
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Yan Q, Zehner DM, Meyer FW, Schippers S. Projectile velocity and target temperature dependence of charge-state distributions of multicharged ions scattered during grazing interactions with a Au(110) surface. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1996; 54:641-648. [PMID: 9913518 DOI: 10.1103/physreva.54.641] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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11
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Stolterfoht N, Arnau A, Salin A, Echenique PM. L-shell filling rates of highly charged ions in metals. PHYSICAL REVIEW LETTERS 1996; 76:4636-4639. [PMID: 10061341 DOI: 10.1103/physrevlett.76.4636] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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12
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Winecki S, Cocke CL, Fry D, Stöckli MP. Neutralization and equilibration of highly charged argon ions at grazing incidence on a graphite surface. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1996; 53:4228-4237. [PMID: 9913392 DOI: 10.1103/physreva.53.4228] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Page R, Saal A, Thomaschewski J, Aberle L, Bleck-Neuhaus J, Köhrbrück R, Grether M, Stolterfoht N. Multistep cascade model for the deexcitation of highly charged ions impinging on a solid surface. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1995; 52:1344-1353. [PMID: 9912372 DOI: 10.1103/physreva.52.1344] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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