Regensburg 2022 – scientific programme

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O: Fachverband Oberflächenphysik

O 54: Poster Wednesday: 2D Materials 2

O 54.3: Poster

Wednesday, September 7, 2022, 18:00–20:00, P4

Vanadyl phthalocyanine: study of the formation of a characteristic molecular spin pattern on a diamagnetic template — •Corina Urdaniz, Kyungju Noh, Luciano Colazzo, Jaehyun Lee, Andreas Heinrich, Christoph Wolf, Fabio Donati, and Yujeong Bae — Center for Quantum Nanoscience (QNS), IBS, Ewha Womans University, Seoul, Republic of korea

Achieving quantum coherent control of spins on surfaces at the atomic scale is the goal for quantum coherent nanoscience. A good surface spin system requires two components: a localized spin and a buffer layer to isolate that spin from the metallic substrate. The use of magnetic molecules as hosts for spin qubits is a promising pathway towards quantum information processing.

In this work, we used Vanadyl phthalocyanine (VOPc), a well-known spin = 1/2 molecule with long coherence times up to one microsecond in its crystalline form, and the non-magnetic Titanyl phthalocyanine (TiOPc) as a buffer layer from the metal. We found that TiOPc is an effective buffer layer, preserving vacuum-like electronic structure of VOPc. We present compelling arguments for using TiOPc as self-assembling templates with long-range order for adsorbed VOPc molecules. Our results suggest that the TiOPc/VOPc system is a potential candidate for long-lived molecular spin states on surfaces for the study of quantum information processing.