Hage, F. S., Nicholls, R. J., Yates, J. R., McCulloch, D. G., Lovejoy, T. C., Dellby, N., Krivanek, O. L., Refson, K. and Ramasse, Q. M. (2018) Nanoscale momentum-resolved vibrational spectroscopy. Science Advances, 4(6), eaar7495. (doi: 10.1126/sciadv.aar7495) (PMID:29951584) (PMCID:PMC6018998)
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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.
| Item Type: | Articles |
|---|---|
| Additional Information: | R.J.N. acknowledges financial support from the EPSRC (grant EP/L022907/1). |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Hage, Dr Fredrik Sydow |
| Authors: | Hage, F. S., Nicholls, R. J., Yates, J. R., McCulloch, D. G., Lovejoy, T. C., Dellby, N., Krivanek, O. L., Refson, K., and Ramasse, Q. M. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Science Advances |
| Publisher: | American Association for the Advancement of Science |
| ISSN: | 2375-2548 |
| ISSN (Online): | 2375-2548 |
| Published Online: | 15 June 2018 |
| Copyright Holders: | Copyright © 2018 The Authors |
| First Published: | First published in Science Advances 4(6):eaar7495 |
| Publisher Policy: | Reproduced under a Creative Commons License |
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