Asymmetry in the reciprocal epitaxy of NaCl and KBr

Maier, S. and Pfeiffer, O. and Glatzel, Th. and Meyer, E. and Filleter, T. and Bennewitz, R.. (2007) Asymmetry in the reciprocal epitaxy of NaCl and KBr. Physical Review B, Vol. 75, H. 19 , 195408, 7 S..

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Official URL: http://edoc.unibas.ch/dok/A5262106

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Ultrathin well-ordered films of KBr on NaCl (100) and of NaCl on KBr (100) have been grown. The films were imaged by means of noncontact atomic force microscopy with atomic resolution under ultrahigh vacuum conditions. An extreme asymmetry in the structure of the interface was found for the two systems. The first layer of KBr on NaCl (100) grows with the lattice constant of bulk KBr, while the first layer of NaCl on KBr (100) stretches to the bulk lattice constant of KBr. The KBr films exhibit a superstructure with the periodicity of the least common multiple of the NaCl and KBr lattice constants, while the stretched NaCl films grow flat. We discuss the anharmonicity of the ionic bond as origin of the dependence of the interface structure on the growth sequence.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Nanomechanik (Meyer)
UniBasel Contributors:Meyer, Ernst
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Institute of Physics
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:22 Mar 2012 14:25
Deposited On:22 Mar 2012 13:48

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