Regensburg 2019 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 87: 2D Materials IV: Charge Density Waves and Electronic Properties

O 87.5: Vortrag

Donnerstag, 4. April 2019, 16:00–16:15, H25

Electronic properties and magnetism of sulphur-deficient VS₂ on Au(111) — Sabina Simon, Felix Förschner, Jannik Dornseiff, Julia Tesch, and •Mikhail Fonin — Department of Physics, University of Konstanz, 78457 Konstanz, Germany

Monolayers of two-dimensional transition metal dichalcogenides (TMDs) have recently received considerable scientific interest due to their unique properties making them prospective materials for novel device applications. Among a large variety of TMDs, VS₂ and VSe₂ monolayers gained specific attention as possible 2D materials with peculiar magnetic properties. The recent discovery of ferromagnetism in VSe₂ [1] boosted the interest in this materials even further.

In this work we discuss the structure and local electronic properties of sulphur-deficient VS₂ nanoribbons on Au(111). By means of low-temperature scanning tunneling microscopy we analyze the exact atomic arrangement within the VS₂ nanoribbons, showing stabilization of the atomic structure with every second sulphur atomic row missing in the upper layer. We observe very strong atomic level variations in the local density of states, which are discussed with respect to emergent magnetism in VS₂.

[1]. M. Bonilla et al., Nature Nanotechnology 13, 289 (2018).