5 years ago

Atomic Structure of Submonolayer NaCl Grown on Ag(110) Surface

Atomic Structure of Submonolayer NaCl Grown on Ag(110) Surface
Hamid Oughaddou, Nicolas Trcera, Karima Lasri, Andrew J. Mayne, Abdallah El Kenz, Azzedine Bendounan, Abdelkader Kara, Abdelilah Benyoussef, Walter Malone, Hanna Enriquez, Khalid Quertite, Gérald Dujardin
We report results on the growth of an NaCl film on Ag(110) under ultrahigh vacuum conditions. At room temperature, low-energy electron diffraction and scanning tunneling microscopy show that the NaCl film forms a (4×1) superstructure. At RT, the film consists of small-sized islands that coalesce into larger islands at 410 K. These large islands preserve the (4×1) superstructure and cover the entire surface. The apparent heights obtained from the STM images show that the initial thickness of the NaCl islands is one atomic layer, and they present a very small height corrugation. The density functional theory calculations, with and without the inclusion of van der Waals effects, confirm the coexistence of two domains in agreement with the observed structure.

Publisher URL: http://dx.doi.org/10.1021/acs.jpcc.7b05150

DOI: 10.1021/acs.jpcc.7b05150

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