Coupled Yu–Shiba–Rusinov States in Molecular
Dimers on NbSe2
Version 2 2018-08-15, 21:11
Version 1 2018-03-16, 18:09
Posted on 2018-08-15 - 21:11
Magnetic
impurities have a dramatic effect on superconductivity
by breaking the time-reversal symmetry and inducing so-called Yu–Shiba–Rusinov
(YSR) low energy bound states within the superconducting gap. The
spatial extent of YSR states is greatly enhanced in two-dimensional
(2D) systems, which should facilitate the formation of coupled states.
Here, we observe YSR states on single cobalt phthalocyanine (CoPC)
molecules on a 2D superconductor NbSe2 using low-temperature
scanning tunneling microscopy (STM) and spectroscopy. We use STM lateral
manipulation to create controlled CoPc dimers and demonstrate the
formation of coupled YSR states. The experimental results are corroborated
by theoretical analysis of the coupled states in lattice and continuum
models.
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Kezilebieke, Shawulienu; Dvorak, Marc; Ojanen, Teemu; Liljeroth, Peter (2018). Coupled Yu–Shiba–Rusinov States in Molecular
Dimers on NbSe2. ACS Publications. Collection. https://doi.org/10.1021/acs.nanolett.7b05050
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AUTHORS (4)
SK
Shawulienu Kezilebieke
MD
Marc Dvorak
TO
Teemu Ojanen
PL
Peter Liljeroth