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TCNQ physisorption on the Bi2Se3 topological insulator

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Della Pia, Ada, Lisi, Simone, De Luca, Oreste, Warr, Daniel, Lawrence, James M., Otrokov, Mikhail, Aliev, Ziya, Chulkov, Evgueni, Agostino, Raffaele, Arnau, Andrés, Papagno, Marco and Costantini, Giovanni (2018) TCNQ physisorption on the Bi2Se3 topological insulator. Chemphyschem . doi:10.1002/cphc.201800259 (In Press)

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Official URL: http://doi.org/10.1002/cphc.201800259

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Abstract

Topological insulators are promising candidates for spintronic applications due to their topologically protected, spin-momentum locked and gapless surface states. The breaking of the time-reversal symmetry after the introduction of magnetic impurities, such as 3d transition metal atoms embedded in two-dimensional molecular networks, could lead to several phenomena interesting for device fabrication. The first step towards the fabrication of metal-organic coordination networks on the surface of a topological insulator is to investigate the adsorption of the pure molecular layer, which is the aim of this study. Here, the effect of the deposition of the electron acceptor 7,7,8,8-tetracyanoquinodimethane (TCNQ) molecules on the surface of a prototypical topological insulator, bismuth selenide (Bi2Se3), is investigated. Scanning tunneling microscope images at low-temperature reveal the formation of a highly ordered two-dimensional molecular network. The essentially unperturbed electronic structure of the topological insulator observed by photoemission spectroscopy measurements demonstrates a negligible charge transfer between the molecular layer and the substrate. Density functional theory calculations confirm the picture of a weakly interacting adsorbed molecular layer. These results reveal significant potential of TCNQ for the realization of metal-organic coordination networks on the topological insulator surface.

Item Type: Journal Article
Subjects: Q Science > QD Chemistry
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science > Chemistry
SWORD Depositor: Library Publications Router
Library of Congress Subject Headings (LCSH): Physisorption, Spintronics
Journal or Publication Title: Chemphyschem
Publisher: Wiley Blackwell
ISSN: 1439-7641
Official Date: 30 May 2018
Dates:
DateEvent
30 May 2018Available
28 May 2018Accepted
Date of first compliant deposit: 12 June 2018
DOI: 10.1002/cphc.201800259
Status: Peer Reviewed
Publication Status: In Press
Access rights to Published version: Restricted or Subscription Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
Early Career FellowshipUniversity of Warwickhttp://dx.doi.org/10.13039/501100000741
308115European Research Councilhttp://viaf.org/viaf/130022607
IE150208[RS] Royal Societyhttp://dx.doi.org/10.13039/501100000288
IT-756-13Euskal Herriko Unibertsitateahttp://dx.doi.org/10.13039/501100003451
FIS2016-75862-PMinisterio de Ciencia e Innovaciónhttp://dx.doi.org/10.13039/501100004837
Project No. 8.1.01.2017Tomsk State Universityhttp://dx.doi.org/10.13039/501100008566
Grant 15.61.202.2015Saint Petersburg State Universityhttp://dx.doi.org/10.13039/501100004285
Project PON03PE_00092_1 (EOMAT)Ministero dell’Istruzione, dell’Università e della Ricercahttp://dx.doi.org/10.13039/501100003407

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