Nanoscale momentum-resolved vibrational spectroscopy

Hage, F, Nicholls, R, Yates, J, McCulloch, D, Lovejoy, T, Dellby, N, Krivanek, O, Refson, K and Ramasse, Q 2018, 'Nanoscale momentum-resolved vibrational spectroscopy', Science Advances, vol. 4, no. 6, pp. 1-7.


Document type: Journal Article
Collection: Journal Articles

Title Nanoscale momentum-resolved vibrational spectroscopy
Author(s) Hage, F
Nicholls, R
Yates, J
McCulloch, D
Lovejoy, T
Dellby, N
Krivanek, O
Refson, K
Ramasse, Q
Year 2018
Journal name Science Advances
Volume number 4
Issue number 6
Start page 1
End page 7
Total pages 7
Publisher American Association for the Advancement of Science
Abstract Vibrational modes affect fundamental physical properties such as the conduction of sound and heat and can be sensitive to nano- and atomic-scale structure. Probing the momentum transfer dependence of vibrational modes provides a wealth of information about a materials system; however, experimental work has been limited to essentially bulk and averaged surface approaches or to small wave vectors. We demonstrate a combined experimental and theoretical methodology for nanoscale mapping of optical and acoustic phonons across the first Brillouin zone, in the electron microscope, probing a volume ~1010 to 1020 times smaller than that of comparable bulk and surface techniques. In combination with more conventional electron microscopy techniques, the presented methodology should allow for direct correlation of nanoscale vibrational mode dispersions with atomic-scale structure and chemistry.
Subject Condensed Matter Characterisation Technique Development
DOI - identifier 10.1126/sciadv.aar7495
Copyright notice Copyright © 2018 The Authors. Creative Commons Attribution License 4.0 (CC BY).
ISSN 2375-2548
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