title: Reflection electron microscopy and interferometry of atomic steps on gold and platinum single crystal surfaces.
abstract: Two beam interferences produced using an electrostatic biprism, which is inserted in the position of the selected area diaphragm of a commercial electron microscope, may be used in reflection electron microscopy to determine the phase shifts induced by structures on single crystal surfaces. A description of our interferometrical and holographical experiments on the phase shift at steps on (111)Au and (111)Pt single crystal surfaces is given and a straight forward interpretation of the results in terms of refraction will be discussed. As a particular result phase shifts of pi and 0.9 pi were measured for monatomic steps on (111)gold and (111)platinum surfaces, respectively.
authors.affiliation: Institute for Applied Physics, University of Tübingen, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Banzhof
authors.forename: K H
authors.initials: KH
authors.lastname: Herrmann
authors.forename: H
authors.initials: H
authors.lastname: Lichte
mesh_terms: D006046:Gold / Q000737:chemistry*; D006696:Holography / Q000379:methods; D007368:Interferometry / Q000379:methods*; D008854:Microscopy, Electron / Q000379:methods*; D010984:Platinum / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D010984:Platinum; D006046:Gold