Berlin 2018 – scientific programme
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O: Fachverband Oberflächenphysik
O 97: Scanning probe techniques: Method development II
O 97.4: Talk
Thursday, March 15, 2018, 15:45–16:00, MA 005
Molecular model of a quantum dot junction beyond the constant interaction approximation — •Ruslan Temirov1,2, Niklas Friedrich1,2, Taner Esat1,2, Philipp Leinen1,2, Matthew F. B. Green1,2, Christian Wagner1,2, Pawel Chmielniak3,4,2, Jeffrey Rawson3,4,2, Paul Kögerler3,4,2, Michael Rohlfing5, and F. Stefan Tautz1,2 — 1Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, Germany — 2Jülich Aachen Research Alliance (JARA)--Fundamentals of Future Information Technology, Jülich, Germany — 3Peter Grünberg Institut (PGI-6), Forschungszentrum Jülich, Germany — 4Institute of Inorganic Chemistry, RWTH Aachen, Germany — 5Institute for Solid-state Theory, University of Münster, Germany
We present a physically intuitive model of molecular quantum dots beyond the constant interaction approximation. It accurately describes their charging behaviour and allows the extraction of important molecular properties that are otherwise experimentally inaccessible. The model is applied to data recorded with a non-contact atomic force microscope (AFM) on three different molecules that act as a quantum dot when attached to the microscope tip [1-2]. Results are in excellent agreement with first principle simulations.
[1] C. Wagner et al. Phys. Rev. Lett. 115, 026101 (2015) [2] M. Green et al. Japan. J. Appl. Phys. 55, 08NA04-7 (2016)