Phonon Spectroscopy at Atomic Resolution

TY - JOUR

T1 - Phonon Spectroscopy at Atomic Resolution

AU - Hage, F. S.

AU - Kepaptsoglou, D. M.

AU - Ramasse, Q. M.

AU - Allen, L. J.

N1 - © 2019 American Physical Society. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details

PY - 2019/1/10

Y1 - 2019/1/10

N2 - Advances in source monochromation in transmission electron microscopy have opened up new possibilities for investigations of condensed matter using the phonon-loss sector of the energy-loss spectrum. Here, we explore the spatial variations of the spectrum as an atomic-sized probe is scanned across a thin flake of hexagonal boron nitride. We demonstrate that phonon spectral mapping of atomic structure is possible. These results are consistent with a model for the quantum excitation of phonons and confirm that Z-contrast imaging is based on inelastic scattering associated with phonon excitation.

AB - Advances in source monochromation in transmission electron microscopy have opened up new possibilities for investigations of condensed matter using the phonon-loss sector of the energy-loss spectrum. Here, we explore the spatial variations of the spectrum as an atomic-sized probe is scanned across a thin flake of hexagonal boron nitride. We demonstrate that phonon spectral mapping of atomic structure is possible. These results are consistent with a model for the quantum excitation of phonons and confirm that Z-contrast imaging is based on inelastic scattering associated with phonon excitation.

UR - http://www.scopus.com/inward/record.url?scp=85059835798&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.122.016103

DO - 10.1103/PhysRevLett.122.016103

M3 - Article

SN - 0031-9007

VL - 122

JO - Physical Review Letters

JF - Physical Review Letters

IS - 1

M1 - 016103

ER -