Theory of momentum-resolved phonon spectroscopy in the electron microscope

Autor:	Nicholls, R. J., Hage, F. S., McCulloch, D. G., Ramasse, Q. M., Refson, K., Yates, J. R.
Rok vydání:	2018
Předmět:	Condensed Matter - Materials Science
Zdroj:	Phys. Rev. B 99, 094105 (2019)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.99.094105
Popis:	We provide a theoretical framework for the prediction and interpretation of momentum dependent phonon spectra due to coherent inelastic scattering of electrons. We complete the approach with first principles lattice dynamics using periodic density functional theory and compare to recent electron energy loss measurements on cubic and hexagonal boron nitride performed within a scanning transmission electron microscope (STEM). The combination of theory and experiment provides the ability to interpret momentum dependent phonon spectra obtained at nanometer spatial resolution in the electron microscope. Comment: 6 pages, 2 figures Reprinted with permission from RJ Nicholls, FS Hage, DG McCulloch, QM Ramasse, K Refson and JR Yates, Phys. Rev. B 99, 094105 (2019). Copyright 2019 by the American Physical Society
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1804.10475 Zobrazit plný text záznamu View this record from Arxiv