240 citations · 1.1k across the 24 of their papers we have counts for
23 papers
Phase offset method of ptychographic contrast reversal correction
Christoph Hofer, Chuang Gao, Tamazouzt Chennit +2
The contrast transfer function of direct ptychography methods such as the single side band (SSB) method are single signed, yet these methods still sometimes exhibit contrast revers…
Reliable phase quantification in focused probe electron ptychography of thin materials
Christoph Hofer, Timothy J. Pennycook
Electron ptychography provides highly sensitive, dose efficient phase images which can be corrected for aberrations after the data has been acquired. This is crucial when very prec…
On central focusing for contrast optimization in direct electron ptychography of thick samples
C. Gao, C. Hofer, T. J. Pennycook
Ptychography provides high dose efficiency images that can reveal light elements next to heavy atoms. However, despite ptychography having an otherwise single signed contrast trans…
Detecting charge transfer at defects in 2D materials with electron ptychography
Christoph Hofer, Jacob Madsen, Toma Susi +1
Electronic charge transfer at the atomic scale can reveal fundamental information about chemical bonding, but is far more challenging to directly image than the atomic structure. T…
Overcoming contrast reversals in focused probe ptychography of thick materials: an optimal pipeline for efficiently determining local atomic structure in materials science
C. Gao, C. Hofer, D. Jannis +3
Ptychography provides highly efficient imaging in scanning transmission electron microscopy (STEM), but questions have remained over its applicability to strongly scattering sample…
Towards Exotic Layered Materials: 2D Cuprous Iodide
Kimmo Mustonen, Christoph Hofer, Peter Kotrusz +10
Heterostructures composed of two-dimensional (2D) materials are already opening many new possibilities in such fields of technology as electronics and magnonics, but far more could…