Electron-Beam Mapping of Vibrational Modes with Nanometer Spatial Resolution

We demonstrate that a focused beam of high-energy electrons can be used to map the vibrational modes of a material with a spatial resolution of the order of one nanometer. Our demonstration is performed on boron nitride, a polar dielectric which gives rise to both localized and delocalized electron-...

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Veröffentlicht in:Physical review letters 2016-12, Vol.117 (25), p.256101-256101, Article 256101
Hauptverfasser: Dwyer, C, Aoki, T, Rez, P, Chang, S L Y, Lovejoy, T C, Krivanek, O L
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Sprache:eng
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Zusammenfassung:We demonstrate that a focused beam of high-energy electrons can be used to map the vibrational modes of a material with a spatial resolution of the order of one nanometer. Our demonstration is performed on boron nitride, a polar dielectric which gives rise to both localized and delocalized electron-vibrational scattering, either of which can be selected in our off-axial experimental geometry. Our experimental results are well supported by our calculations, and should reconcile current controversy regarding the spatial resolution achievable in vibrational mapping with focused electron beams.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.117.256101