Suzuki, T, Lawrence, J, Morbec, JM, Kratzer, P and Costantini, G (2019) Surface structural phase transition induced by the formation of metal–organic networks on the Si(111)-√7×√3-In surface. Nanoscale, 11 (45). pp. 21790-21798.

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Abstract

We studied the adsorption of 7,7,8,8-tetracyanoquinodimethane (TCNQ) on the Si(111)√7×√3 In surface, a known surface superconductor. Scanning tunneling microscopy shows the development of a surface-confined metal–organic network (SMON) where TCNQ molecules coordinate with indium atoms from the underlyin g √7×√3 reconstruction. The formation of the SMON causes a surface structural phase transition from the √7×√3 reconstruction to a previously unknown 5 × 5 reconstruction of the Si(111)–In surface. Scanning tunneling spectroscopy measurements indicate that the 5 × 5 reconstruction has a stronger insulating character than the √7×√3 reconstruction. Density-functional-theory calculations are used to evaluate the atomic arrangement and stability of the 5 × 5 and √7×√3 reconstructions as a function of In coverage, and suggest that the structural phase transition is driven by a slight reduction of the In coverage, caused by the incorporation of indium atoms into the SMON.

Item Type: Article
Additional Information: This is the accepted author manuscript (AAM). The final published version (version of record) is available online via Royal Society of Chemistry at http://doi.org/10.1039/C9NR07074E - please refer to any applicable terms of use of the publisher.
Subjects: Q Science > QC Physics
Q Science > QD Chemistry
T Technology > T Technology (General)
Divisions: Faculty of Natural Sciences > School of Chemical and Physical Sciences
Depositing User: Symplectic
Date Deposited: 06 Nov 2019 10:30
Last Modified: 18 Dec 2019 12:34
URI: http://eprints.keele.ac.uk/id/eprint/7145

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