Regensburg 2022 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 5: Organic Molecules at Surfaces 1: Substrate Effects
O 5.3: Vortrag
Montag, 5. September 2022, 11:15–11:30, S051
Electron spin resonance of iron-phthalocyanine molecules on a surface — •Christoph Wolf1,2, Xue Zhang2,3, Yu Wang1,2, Philip Willke4, Andreas J. Heinrich1,5, and Taeyoung Choi5 — 1Center for Quantum Nanoscience, Institute for Basic Science (IBS), Seoul, Republic of Korea — 2Ewha Womans University, Seoul, Republic of Korea — 3Institute of Spin Science and Technology, South China University of Technology Guangzhou, China — 4Physikalisches Institut, Karlsruhe Institute of Technology, Karlsruhe, Germany — 5Department of Physics, Ewha Womans University, Seoul, Republic of Korea.
The combination of the high energy resolution of electron spin resonance (ESR) and high spatial resolution of the scanning tunneling microscope (STM) resulted in a novel probe with unparalleled capabilities for the study of surface physics.
In this work, we present the first application of this tool to molecules by ESR-STM spectroscopy of iron-phthalocyanine (FePc) molecules on thin layers of the insulator magnesium-oxide deposited on silver. Here, I will focus on the insight gained by combining density functional theory (DFT) and ESR-STM experiment. I will highlight successes and shortcomings of DFT by discussing electronic states of single FePc molecules as well as the interaction between FePc dimers at the neV energy scale.
Finally, I will give an outlook on quantum coherent properties of FePc based on pulsed ESR measurements and a non-equilibrium Green's function model.