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Surface structural phase transition induced by the formation of metal-organic networks on Si(111)- √7×√3-In surface
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Suzuki, T., Lawrence, James M., Morbec, J. M., Kratzer, P. and Costantini, Giovanni (2019) Surface structural phase transition induced by the formation of metal-organic networks on Si(111)- √7×√3-In surface. Nanoscale, 11 (45). pp. 21790-21798. doi:10.1039/C9NR07074E ISSN 2040-3364.
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Official URL: https://doi.org/10.1039/C9NR07074E
Abstract
We studied the adsorption of 7,7,8,8-tetracyanoquinodimethane (TCNQ) on the Si(111)- Image ID:c9nr07074e-t3.gif-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 underlying Image ID:c9nr07074e-t4.gif reconstruction. The formation of the SMON causes a surface structural phase transition from the Image ID:c9nr07074e-t5.gif 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 Image ID:c9nr07074e-t6.gif reconstruction. Density-functional-theory calculations are used to evaluate the atomic arrangement and stability of the 5 × 5 and Image ID:c9nr07074e-t7.gif 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: | Journal Article | ||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||||||
Journal or Publication Title: | Nanoscale | ||||||||
Publisher: | Royal Society of Chemistry | ||||||||
ISSN: | 2040-3364 | ||||||||
Official Date: | 7 December 2019 | ||||||||
Dates: |
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Volume: | 11 | ||||||||
Number: | 45 | ||||||||
Page Range: | pp. 21790-21798 | ||||||||
DOI: | 10.1039/C9NR07074E | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Date of first compliant deposit: | 30 October 2019 | ||||||||
Date of first compliant Open Access: | 6 November 2020 | ||||||||
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