Nature of the bias-dependent symmetry reduction of iron phthalocyanine on Cu(111)

Olesia Snezhkova, Johann Lüder, Alissa Wiengarten, Shiri R. Burema, Felix Bischoff, Yuanqin He, Jan Rusz, Jan Knudsen, Marie-Laure Bocquet, Knud Seufert, Johannes V. Barth, Willi Auwärter, Barbara Brena, and Joachim Schnadt

Phys. Rev. B 92, 075428 – Published 19 August 2015

Abstract

Subtle changes in the geometric and electronic properties of supported molecules, with a potential impact on the functioning of molecular devices, can typically be imaged by scanning probe microscopy, but their exact origin and nature often remain unclear. Here we show explicitly that the symmetry reduction of iron phthalocyanine upon adsorption on Cu(111) can be observed not only in scanning tunneling microscopy, but also in core-level spectroscopy, and that it is related to nonisotropic charge transfer into the two principal molecular axes, but in combination with topographic influences.

Received 5 May 2015

DOI:https://doi.org/10.1103/PhysRevB.92.075428

Authors & Affiliations

Olesia Snezhkova¹, Johann Lüder², Alissa Wiengarten³, Shiri R. Burema⁴, Felix Bischoff³, Yuanqin He³, Jan Rusz², Jan Knudsen¹, Marie-Laure Bocquet^4,*, Knud Seufert^3,†, Johannes V. Barth³, Willi Auwärter³, Barbara Brena², and Joachim Schnadt^1,‡

¹Division of Synchrotron Radiation Research, Department of Physics, Lund University, Box 118, 221 00 Lund, Sweden
²Department of Physics and Astronomy, Uppsala University, Box 516, 751 20 Uppsala, Sweden
³Physik Department E20, Technische Universität München, 85748 Garching, Germany
⁴Laboratoire de Chimie, Ecole Normale Supérieure de Lyon, 46, Allée d'Italie, 69364 Lyon Cedex 07, France

^*Present address: Département de Chimie, Ecole Normale Supérieure, PSL Research University, Sorbonne Universités, UPMC Université Paris 06, CNRS UMR 8640 Pasteur, 24 rue Lhomond, 75005 Paris, France.
^†Present address: Institut für Chemie, Karl-Franzens-Universität Graz, 8010 Graz, Austria.
^‡joachim.schnadt@sljus.lu.se; http://www.sljus.lu.se

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Issue

Vol. 92, Iss. 7 — 15 August 2015

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