Absolute scale electron holography at atomic resolution

April 2018

by Florian Winkler, Juri Barthel, Amir H Tavabi, Sven Borghardt, Beata E Kardynal, and Rafal E Dunin-Borkowski

An absolute scale match between experiment and simulation in atomic-resolution off-axis electron holography is demonstrated, with unknown experimental parameters determined directly from the recorded electron wave function using an automated numerical algorithm. It is shown that the local thickness and tilt of a pristine thin WSe2 flake can be measured uniquely, whereas some electron optical aberrations cannot be determined unambiguously for a periodic object. The ability to determine local specimen and imaging parameters directly from electron wave functions is of great importance for quantitative studies of electrostatic potentials in nanoscale materials, in particular when performing in situ experiments and considering that aberrations change over time.

Further reading:

Florian Winkler, Juri Barthel, Amir H Tavabi, Sven Borghardt, Beata E Kardynal, and Rafal E Dunin-Borkowski:

Absolute scale quantitative off-axis electron holography at atomic resolution, Physical Review Letters 120 (2018) 156101