Effect of small crystal tilt on atomic-resolution high-angle annular dark field STEM imaging.
Using a slightly tilted convergent electron beam, high-angle annular dark field scanning transmission electron microscopy observations have been performed of a [0 11]-oriented Si crystal. A small tilt of the crystal zone axis with respect to the coma-axis of the probe-forming lens causes a difference in intensity between bright spots of a Si dumbbell. The semiangle of the beam probe and the tilting angle with respect to the specimen hormal were determined by means of convergent beam micro-diffraction. The simulation using these parameters accounts for the image contrasts satisfactorily.
Yamazaki
T
T
Department of Physics, Tokyo University of Science, Japan. a1299660@rs.kagu.sut.ac.jp
Kawasaki
M
M
Watanabe
K
K
Hashimoto
I
I
Shiojiri
M
M