Journal
PHYSICAL REVIEW RESEARCH
Volume 3, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevResearch.3.013225
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Funding
- Swiss National Science Foundations [200021-169017, 200021-182695]
- National Center of Competence in Research in Molecular Ultrafast Science and Technology (NCCR MUST) from the Swiss National Science Foundations [51NF40-183615]
- European Union [801459]
- Swiss National Science Foundation (SNF) [200021_169017] Funding Source: Swiss National Science Foundation (SNF)
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A highly ordered moire lattice was identified at the buried SrTiO3 (STO)-(La,Sr)(Al,Ta)-oxide (LSAT) interface through high-resolution x-ray diffraction and transmission electron microscopy images. This ordered superstructure sets ideal conditions for moire-tuned interfacial electronic modifications and ferroelectric supercrystallinity.
We identified a highly ordered moire lattice at the buried SrTiO3 (STO)-(La,Sr)(Al,Ta)-oxide (LSAT) interface by high-resolution x-ray diffraction reciprocal space mapping. We found long-ranged ordered supercells of 106/107 unit cells of unstrained STO-LSAT caused by complete lattice relaxation through high-temperature annealing. Transmission electron microscopy images show that this periodicity is based on line dislocations at the interface region. The presence of such ordered superstructures in such widely used complex oxides sets the ideal conditions for moire-tuned interfacial electronic modifications and ferroelectric supercrystallinity, opening the possibility for interface functionalities and impacting findings on vortex structured multilayers systems.
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