Berlin 2024 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 43: Focus Session: Spins on Surfaces studied by Atomic Scale Spectroscopies IV
O 43.10: Vortrag
Mittwoch, 20. März 2024, 12:45–13:00, MA 004
A straight forward method to read the nuclear qudit of 4f-single molecular magnets: 163DyPc2 — •Hongyan Chen1, Simon Gerber1, Philip Schmid1, Vera Schmeiser1, Svetlana Klyatskaya1, Eufemio Moreno-Pineda2, Mario Ruben1,3, and Wulf Wulfhekel1 — 1Karlsruhe Institute of Technology , Germany — 2Universidad de Panamá — 3Centre Européen de Sciences Quantiques, Strasbourg
The nuclear spin in single molecular magnets (SMMs) has been used for quantum information processing and has so far been detected by transitions of the magnetic moment during sweeping the magnetic field [1]. We here present a faster method to directly read the nuclear spin (I=5/2) of 163DyPc2 using spin-polarized scanning tunneling microscopy (Sp-STM) without the need for a magnetic field. For (I=0) DyPc2 on Au(111), we recently demonstrated that the Dy3+ electron spin can be read out by Sp-STM but loses remanence due to the non-Kramers nature [2]. Adding the nuclear spin of I=5/2 restores Kramers protection and shifts the magnetization curve of Dy3+ by the hyperfine field. Measuring the spin polarization of the Kondo state at vanishing magnetic field thus directly reveals the quantum state of the nucleus. We observe T1 times in excess of minutes at 35 mK. First results on nuclear magnetic resonance transitions between the nuclear states inducing by radio frequency voltages injected into the tunneling junction will be presented. [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).