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O: Fachverband Oberflächenphysik

O 70: Poster: Spins on Surfaces & Surface Magnetism

O 70.5: Poster

Mittwoch, 20. März 2024, 18:00–20:00, Poster C

Manipulating Quantum States: Indirect Readout of ¹⁶³DyPc₂ Single-Molecule Magnets via Spin Cascade on Au(111) using Scanning Tunneling Microscopy — •Simon Gerber¹, Hongyan Chen¹, Philip Schmid¹, Vera Schmeiser¹, Svetlana Klyatskaya¹, Eufemio Moreno-Pineda², Mario Ruben^1,3, and Wulf Wulfhekel¹ — ¹Karlsruher Institute of Technology — ²Universidad de Panamá — ³Centre Européen de Sciences Quantiques, Straßbourg

We present an innovative method to indirectly read the nuclear spin of ¹⁶³DyPc₂ (I=5/2) single-molecule magnets on Au(111) using milli-Kelvin scanning tunneling microscopy. The Kondo effect, initiated by an unpaired electron in the π-radical on the exposed Pc ligand, induces a spin cascade^[1,2], revealing discrete signal jumps on the order of minutes. These jumps, which may be correlated with nuclear spin flips, suggest possibilities for manipulation with an RF source. First results of RF-induced transitions are presented. This study focuses on the interplay between local 4f electrons, unpaired electrons and nuclear spins in rare earth-based systems. We demonstrate that reading the nuclear spin of ¹⁶³DyPc₂ using spin-polarised scanning tunneling microscopy (Sp-STM) does not need a magnetic field. This research makes a significant contribution to the understanding and manipulation of quantum states in single molecule magnets.

[1] R. Vincent et al,. Nature 488, 357 (2012); S. Thiele et al., Science 344, 1135 (2014) [2] T. Frauhammer, H. Chen et al., Phys. Rev. Lett. 127, 123201 (2021)

Keywords: Rare-earth magnets; Spin-polarized spectroscopy; Nuclear spin dynamics; Spin-polarised scanning tunneling microscopy; 163DyPc2