Regensburg 2022 – scientific programme

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DS: Fachverband Dünne Schichten

DS 14: Focus session: Quantum Properties at Functional Oxide Interfaces 2 (joint session DS/HL)

DS 14.1: Invited Talk

Wednesday, September 7, 2022, 09:30–10:00, H17

Facet dependence of reconstructions at quantum material interfaces — •Eva Benckiser — Max Planck Institute for Solid State Research, Stuttgart, Germany

Oxide heterostructures promise a rational design of quantum materials with specific, functional properties such as magnetism and superconductivity. Our research aims to gain a fundamental understanding of spin, orbital, charge and lattice reconstructions at complex transition-metal oxide interfaces, mainly using x-ray spectroscopy.

In my talk, I will focus on implications of the choice of the crystallographic facet of the interface by showing examples of two prototypical correlated-electrons materials. In NdNiO₃ epitaxial thin films we observe modifications of the metal-insulator transition, which we explain by the facet dependence of the bond-order instability in the system [1]. The choice of a specific interface facet, in turn, allows to manipulate the complex spin order in ultrathin NdNiO₃ slabs [2]. In YVO₃ heterostructures, an artificial, layered orbital occupation pattern can be realized by the choice of the interface facet [3]. I have conducted the above-mentioned studies in collaboration with many scientists who are co-authors of the publications listed below.

[1] Y. E. Suyolcu, K. Fürsich et al., Phys. Rev. Materials 5, 045001 (2021). [2] M. Hepting et al., Nature Physics 14, 1097 (2018). [3] P. Radhakrishnan et al., Phys. Rev. B 104, L121102 (2021); Phys. Rev. B 105, 165117 (2022).