Spin state of magnetic molecules modified by the substrate
Event Details
When molecules are adsorbed on a substrate, their electronic states tend to mix depending on the symmetry of the adsorption site. STM is a useful tool to characterize the symmetry of the site and for spectroscopy utilizing its ultimate spatial resolution.
Spin state of the molecule is one of the examples, where it depends on the strength of the coupling between the molecule and substrate. With strong coupling as the case for Cu(110), the spin of FePc is completely killed whereas if decoupled as on Cu(110) 2×1-O, spin survives with change in the direction of easy axis.
On Au, weak coupling leads to appearance of Kondo state, where a competition between the RKKY interaction affects the spin state Kondo state of FePc on Au depends on the symmetry of the adsorption site.
With connecting both side of molecule by touching the vacuum side of the molecule with STM tip, an interesting behavior of switching in a single molecule quantum dot state was observed.
Spin state of the molecule is one of the examples, where it depends on the strength of the coupling between the molecule and substrate. With strong coupling as the case for Cu(110), the spin of FePc is completely killed whereas if decoupled as on Cu(110) 2×1-O, spin survives with change in the direction of easy axis.
On Au, weak coupling leads to appearance of Kondo state, where a competition between the RKKY interaction affects the spin state Kondo state of FePc on Au depends on the symmetry of the adsorption site.
With connecting both side of molecule by touching the vacuum side of the molecule with STM tip, an interesting behavior of switching in a single molecule quantum dot state was observed.