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Probing the Electronic Properties of Individual MnPc Molecules Coupled to Topological States | | Paolo Sessi
; Thomas Bathon
; Konstantin K. Kokh
; Oleg E. Tereshchenko
; Matthias Bode
; | | Date: |
27 Oct 2014 | | Abstract: | Hybrid organic/inorganic interfaces have been widely reported to host
emergent properties that go beyond those of their single constituents. Coupling
molecules to the recently discovered topological insulators, which possess a
linearly dispersing and spin-momentum--locked Dirac fermions, may offer a
promising platform towards new functionalities. Here, we report a scanning
tunneling microscopy and spectroscopy study of the prototypical interface
between MnPc molecules and a Bi$_2$Te$_3$ surface. MnPc is found to bind stably
to the substrate through its central Mn atom. The adsorption process is only
accompanied with a minor charge transfer across the interface, resulting in a
moderately n-doped Bi$_2$Te$_3$ surface. More remarkably, topological states
remain completely unaffected by the presence of the molecules, as evidenced by
the absence of scattering patterns around adsorption sites. Interestingly, we
show that, while the HOMO and LUMO orbitals closely resembles those of MnPc in
the gas phase, a new hybrid states emerges through interaction with the
substrate. Our results pave the way towards hybrid organic--topological
insulator heterostructures, which may unveil a broad range of exciting and
unknown phenomena. | | Source: | arXiv, 1410.7179 | | Services: | Forum | Review | PDF | Favorites | |
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