Home > Publications database > Controlling in-gap end states by linking nonmagnetic atoms and artificially-constructed spin chains on superconductors > print

001     884855
005     20210423193419.0
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100 1 _ |a Schneider, Lucas
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245 _ _ |a Controlling in-gap end states by linking nonmagnetic atoms and artificially-constructed spin chains on superconductors
260 _ _ |a [London]
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520 _ _ |a Chains of magnetic atoms with either strong spin-orbit coupling or spiral magnetic order which are proximity-coupled to superconducting substrates can host topologically non-trivial Majorana bound states. The experimental signature of these states consists of spectral weight at the Fermi energy which is spatially localized near the ends of the chain. However, topologically trivial Yu-Shiba-Rusinov in-gap states localized near the ends of the chain can lead to similar spectra. Here, we explore a protocol to disentangle these contributions by artificially augmenting a candidate Majorana spin chain with orbitally-compatible nonmagnetic atoms. Combining scanning tunneling spectroscopy with ab-initio and tight-binding calculations, we realize a sharp spatial transition between the proximity-coupled spiral magnetic order and the non-magnetic superconducting wire termination, with persistent zero-energy spectral weight localized at either end of the magnetic spiral. Our findings open a new path towards the control of the spatial position of in-gap end states, trivial or Majorana, via different chain terminations, and the realization of designer Majorana chain networks for demonstrating topological quantum computation.
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536 _ _ |a First-principles investigation of single magnetic nano-skyrmions (jias17_20190501)
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536 _ _ |a First-principles investigation of long range effects in magnetic nanostructures (jias1c_20191101)
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700 1 _ |a Brinker, Sascha
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700 1 _ |a Steinbrecher, Manuel
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700 1 _ |a Hermenau, Jan
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700 1 _ |a Posske, Thore
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700 1 _ |a dos Santos Dias, Manuel
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700 1 _ |a Lounis, Samir
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700 1 _ |a Wiesendanger, Roland
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700 1 _ |a Wiebe, Jens
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773 _ _ |a 10.1038/s41467-020-18540-3
|g Vol. 11, no. 1, p. 4707
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|t Nature Communications
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856 4 _ |u https://juser.fz-juelich.de/record/884855/files/s41467-020-18540-3.pdf
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