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O: Fachverband Oberflächenphysik

O 43: Focus Session: Spins on Surfaces studied by Atomic Scale Spectroscopies IV

O 43.2: Talk

Wednesday, March 20, 2024, 10:45–11:00, MA 004

Controlling spin excitations of a single molecular magnet — •Maximilian Kögler, Nicolas Néel, and Jörg Kröger — Institut für Physik, TU Ilmenau, Ilmenau, D-98693, Germany

A single molecular magnet (SMM) with a robust spin S=1 was attached to the tip of a scanning tunneling microscope. The spin excitation spectrum was probed by inelastic electron tunneling spectroscopy as a function of the vertical distance to the metal surface, an adsorbed atom and an artificially crafted metal cluster. Above the clean metal surface the SMM spin excitation reduces its energy upon decreasing the distance. Possibly, the magnetic anisotropy energy is affected by relaxations of the junction geometry. In contrast, the excitation spectrum remains invariant atop the adsorbed atoms and vanishes abruptly upon collapsing the tunneling barrier. Funding by the Deutsche Forschungsgemeinschaft through KR 2912/21-1 is acknowledged.

Keywords: single molecular magnet; inelastic tunneling spectroscopy