Electronic Resonances and Gap Stabilization of Higher Acenes on a Gold Surface
Krueger J, Eisenhut F, Skidin D, Lehmann T, Ryndyk DA, Cuniberti G, Garcia F, Alonso JM, Guitian E, Perez D, Pena D, Trinquier G, Malrieu JP, Moresco F, Joachim C (2018)
Publication Type: Journal article
Publication year: 2018
Journal
Book Volume: 12
Pages Range: 8506-8511
Journal Issue: 8
Abstract
On-surface synthesis provides a powerful method for the generation of long acene molecules, making possible the detailed investigation of the electronic properties of single higher acenes on a surface. By means of scanning tunneling microscopy and spectroscopy combined with theoretical considerations, we discuss the polyradical character of the ground state of higher acenes as a function of the number of linearly fused benzene rings. We present energy and spatial mapping of the tunneling resonances of hexacene, heptacene, and decacene, and discuss the role of molecular orbitals in the observed tunneling conductance maps. We show that the energy gap between the first electronic tunneling resonances below and above the Fermi energy stabilizes to a finite value, determined by a first diradical electronic perturbative contribution to the polyacene electronic ground state. Up to decacene, the main contributor to the ground state of acenes remains the lowest-energy closed-shell electronic configuration.
Involved external institutions
Technische Universität Dresden
Germany (DE)
Universidade de Santiago Compostela (USC)
Spain (ES)
Université Toulouse III - Paul Sabatier
France (FR)
Center for Materials Elaboration and Structural Studies / Centre d’Élaboration de Matériaux et d’Études Structurales
France (FR)
Germany (DE)
Universidade de Santiago Compostela (USC)
Spain (ES)
Université Toulouse III - Paul Sabatier
France (FR)
Center for Materials Elaboration and Structural Studies / Centre d’Élaboration de Matériaux et d’Études Structurales
France (FR)
How to cite
APA:
Krueger, J., Eisenhut, F., Skidin, D., Lehmann, T., Ryndyk, D.A., Cuniberti, G.,... Joachim, C. (2018). Electronic Resonances and Gap Stabilization of Higher Acenes on a Gold Surface. ACS nano, 12(8), 8506-8511. https://doi.org/10.1021/acsnano.8b04046
MLA:
Krueger, Justus, et al. "Electronic Resonances and Gap Stabilization of Higher Acenes on a Gold Surface." ACS nano 12.8 (2018): 8506-8511.
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