TY - JOUR
T1 - On the thickness periodicity of atomic-resolution images of dislocation cores
AU - Spence, John
AU - O'Keefe, M. A.
AU - Iijima, S.
N1 - Funding Information:
The authors acknowledge useful discussions with Dr. A. Winter, Dr. 0. Krivanek and Professor J. M. Cowley. This work was supported by the Centre for Solid State Science at Arizona State University with assistance gratefully received from Mr. J. Wheatley and Mr. H. Kolar. We further acknowledge the support of NSF Grant No. EAR 77-00128 (M.A.O.).
PY - 1978/10
Y1 - 1978/10
N2 - Experimental conditions needed to obtain atomic-resolution images of dislocation cores are discussed. Experimental and computer-simulated images are used to show that, to a limited but useful resolution, these images are periodic functions of the specimen thickness as a consequence of dynamical scattering. Useful images may therefore be obtained from some specimens of sufficient thickness to allow surface relaxation effects to be neglected. End-on projections of stair-rod dislocations and dislocation dipoles are suggested for further study.
AB - Experimental conditions needed to obtain atomic-resolution images of dislocation cores are discussed. Experimental and computer-simulated images are used to show that, to a limited but useful resolution, these images are periodic functions of the specimen thickness as a consequence of dynamical scattering. Useful images may therefore be obtained from some specimens of sufficient thickness to allow surface relaxation effects to be neglected. End-on projections of stair-rod dislocations and dislocation dipoles are suggested for further study.
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U2 - 10.1080/01418617808239247
DO - 10.1080/01418617808239247
M3 - Article
AN - SCOPUS:0018021460
VL - 38
SP - 463
EP - 482
JO - Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
JF - Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
SN - 0141-8610
IS - 4
ER -