Regensburg 2022 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 42: Metal substrates 2

O 42.2: Vortrag

Mittwoch, 7. September 2022, 10:45–11:00, S053

Peculiar growth of Mn on Ir (111) investigated by SP-STM — •Arturo Rodríguez Sota, Vishesh Saxena, André Kubetzka, Jonas Spethmann, Roland Wiesendanger, and Kirsten von Bergmann — Institut für Nanostruktur- und Festkörperphysik, Universität Hamburg

The growth of metallic layers has been studied for many years, from single atom coverages via clusters and islands to extended films. The experimental parameters used during the growth, such as deposition temperature or amount of material, determine the resulting phase. Usually, only one phase is present for a given preparation, but for europium on graphene the coexistence of clusters and islands of has been documented. This was attributed to several effects including charge transfer from the metal clusters to the substrate in a precise window of coverage and temperature [1].

Here we study the growth of Mn on Ir(111) using spin polarized scanning tunneling microscopy (SP-STM). In this metallic system we have found the coexistence of clusters and islands for any Mn sub-monolayer coverage. We have characterized the clusters in detail at low temperature and found several different configurations made out of three atoms. The Mn islands exhibit a reconstruction that disappears when the layer is completely closed. The monolayer presents the Néel state as its magnetic ground state.

[1] D. F. Förster et al., New J. Phys. 14, 023022 (2012).