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Regensburg 2019 – scientific programme

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O: Fachverband Oberflächenphysik

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

O 87.5: Talk

Thursday, April 4, 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).

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