Coherence during scattering of fast H atoms from a LiF(001) surface

Coherence during scattering of fast H atoms from a LiF(001) surface

The coherence for diffraction effects during grazing scattering of fast hydrogen and helium atoms from a LiF(001) surface with energies up to some keV is investigated via the coincident detection of two-dimensional angular distributions for scattered projectiles with their energy loss. For keV H ato...

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Veröffentlicht in:Physical review letters 2011-02, Vol.106 (6), p.067602-067602, Article 067602
Hauptverfasser: Lienemann, J, Schüller, A, Blauth, D, Seifert, J, Wethekam, S, Busch, M, Maass, K, Winter, H
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container_issue 6
container_start_page 067602
container_title Physical review letters
container_volume 106
creator Lienemann, J
Schüller, A
Blauth, D
Seifert, J
Wethekam, S
Busch, M
Maass, K
Winter, H
description The coherence for diffraction effects during grazing scattering of fast hydrogen and helium atoms from a LiF(001) surface with energies up to some keV is investigated via the coincident detection of two-dimensional angular distributions for scattered projectiles with their energy loss. For keV H atoms, we identify electronic excitations of the target surface as the dominant mechanism for decoherence, whereas for He atoms this contribution is small. The suppression of electronic excitations owing to the band gap of insulators plays an essential role for preserving quantum coherence and thus for the application of fast atom diffraction as a surface analytical tool.
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title Coherence during scattering of fast H atoms from a LiF(001) surface
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