Berlin 2018 – scientific programme

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O: Fachverband Oberflächenphysik

O 98: Electronic structure: Surface magnetism and spin phenomena I

O 98.13: Talk

Thursday, March 15, 2018, 18:15–18:30, MA 042

Tuning the spin-related transport properties of FePc on Au(111) through single-molecule chemistry — •Ruoning Li and Yongfeng Wang — Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing, China

Tuning the spin-dependent transport through molecules is of fundamental importance in single-molecule spintronics. Here, the transport properties of iron phthalocyanine (FePc) on Au(111) was investigated by a combination of scanning tunneling microscopy and density functional theory (DFT) calculations. In the high-resolution STS spectrum of FePc measured at 0.5 K, the Kondo resonance was observed. After removing its eight outermost hydrogen atoms, the spectroscopic feature changed to a double-step structure, which reflected a transition of molecular spin states. The DFT calculations revealed that the coupling between Fe and Au(111) got much weaker after cutting the hydrogen atoms. This explained the changing of the spin-related transport FePc on Au(111).