Subatomic Channeling and Helicon-Type Beams in SrTiO3

Jong Seok Jeong, Hosup Song, Jacob T. Held, Andre Mkhoyan

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Abstract

Inspired by recent experimental subatomic measurements using analytical aberration-corrected scanning transmission electron microscopes, we study electron probe propagation in crystalline SrTiO3 at the subatomic length scale. Here, we report the existence of subatomic channeling and the formation of a helicon-type beam at this scale. The results of beam propagation simulations, which are performed at various crystal temperatures, STEM probe convergence angles (10-50 mrad), and beam energies (80-300 keV), showed that reducing the ambient temperature can enhance the subatomic channeling and STEM probe parameters can be used to control the features of helicon-type beams.

Original languageEnglish (US)
Article number075501
JournalPhysical Review Letters
Volume122
Issue number7
DOIs
StatePublished - Feb 20 2019

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