Probing molecular spins at surfaces

DIPC Seminars

Richard Berndt, Christian-Albrechts-Universität zu Kiel, Germany
Donostia International Physics Center
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Probing molecular spins at surfaces Using low-temperature scanning tunneling microscopy and occasionally synchrotron radiation methods we investigate molecules at surfaces. The experiments reveal molecular spin states and electron transport properties as well as intermolecular interactions. This talk will address spin related phenomena such as spin-state switching in spincrossover compounds. We further demonstrate that diamagnetic molecules can acquire a spin when they are arranged into suitable supramolecules on superconducting Pb. As a consequence, sharp resonances develop in the superconductor gap. We harness them to enhance inelastic tunneling spectroscopy of molecular vibrations. This new methods drastically enhances the sensitivity and also improves the energy resolution beyond the thermal broadening limit. It may help to further probe the interaction of molecules with their environment and to better understand selection rules for vibrational excitation. Host: Aran Garcia-Lekue