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Pré-Publication, Document De Travail Année : 2023

Observation of the sliding phason mode of the incommensurate magnetic texture in Fe/Ir(111)

Hung-Hsiang Yang
  • Fonction : Auteur
Louise Desplat
Volodymyr P Kravchuk
  • Fonction : Auteur
Timofey Balashov
  • Fonction : Auteur
Simon Gerber
  • Fonction : Auteur
Markus Garst
  • Fonction : Auteur
Bertrand Dupé
  • Fonction : Auteur
Wulf Wulfhekel
  • Fonction : Auteur

Résumé

The nanoscopic magnetic texture forming in a monolayer of iron on the (111) surface of iridium, Fe/Ir(111), is spatially modulated and uniaxially incommensurate with respect to the crystallographic periodicities. As a consequence, a low-energy magnetic excitation is expected that corresponds to the sliding of the texture along the incommensurate direction, i.e., a phason mode, which we explicitly confirm with atomistic spin simulations. Using scanning tunneling microscopy (STM), we succeed to observe this phason mode experimentally. It can be excited by the STM tip, which leads to a random telegraph noise in the tunneling current that we attribute to the presence of two minima in the phason potential due to the presence of disorder in our sample. This provides the prospect of a floating phase in cleaner samples and, potentially, a commensurate-incommensurate transition as a function of external control parameters.
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Dates et versions

hal-04284402 , version 1 (14-11-2023)

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Hung-Hsiang Yang, Louise Desplat, Volodymyr P Kravchuk, Marie Hervé, Timofey Balashov, et al.. Observation of the sliding phason mode of the incommensurate magnetic texture in Fe/Ir(111). 2023. ⟨hal-04284402⟩
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