Chemical termination and interfacial redox behavior of freestanding SrTiO3

Published: 9 October 2025

The delamination of free-standing oxide membranes has significantly enlarged the application environments for atomically tailored, epitaxial oxide heterostructures. In this paper, we report on recent advances in controlling the chemical termination, surface morphology, and redox behavior of such free-standing oxide membranes. As we describe, there are distinct differences in the formation process of oxygen vacancy defects, owing to the spatial confinement of nanometer-thin oxide membranes, potentially allowing to create highly confined ionic-electronic defect structures on a transferable material platform. Further information can be found in the full paper at https://doi.org/10.1038/s41598-025-15902-z

Funding:
5233 - Memristive Materials and Devices (POF4-523) (POF4-523)
FLAG-ERA JTC 2019 project Transferable two-dimensional correlated oxide layers (To2Dox)
DFG, project no. 436610738 (DI 919/8-1)
DFG, project no. 522417350 (GU 1604/6-1)
DFG, project no. 493705276 (GU 1604/4-1)
Neurotec
Journal: Scientific Reports volume 15, Article number: 35238 (2025)
Authors: M. A. Wohlgemuth, K. Nayak, A. Kaus, L. Heymann, L.-K. Huang, A. Sarantopoulos, J. D. Thomsen, R. E. Dunin-Borkowski, V. Rouco, J. Santamaría, R. Dittmann, F. Gunkel
DOI: https://doi.org/10.1038/s41598-025-15902-z

Contact

Dr. Felix Gunkel