Polar-discontinuity-retaining A-site intermixing and vacancies at SrTiO3/LaAlO3 interfaces

Vonk, V. and Huijben, J. and Kukuruznyak, D. and Stierle, A. and Hilgenkamp, H. and Brinkman, A. and Harkema, S. (2012) Polar-discontinuity-retaining A-site intermixing and vacancies at SrTiO3/LaAlO3 interfaces. Physical review B: Condensed matter, 85 (4). 1 - 5. ISSN 0163-1829

Preview

PDF
502Kb

Abstract:	Our anomalous surface x-ray diffraction study of the interface between SrTiO3(001) substrates and thin polar films of LaAlO3 shows La/Sr interdiffusion leading to neutrally charged Sr1−1.5xLaxO layers. From a thickness of two unit cells, the LaAlO3 film's interior retains its polar stacking sequence, which is compensated by a cationic compositional change of the substrate's terminating TiO2 layer. While such valence-retaining A-site intermixing does not resolve the polar catastrophe, it may be a general feature at oxide interfaces influencing the electronic and magnetic properties
Item Type:	Article
Copyright:	© American Physical Society
Faculty:	Science and Technology (TNW)
Research Group:	Interfaces and Correlated Electron Systems (ICE)
Link to this item:	http://purl.utwente.nl/publications/82009
Official URL:	http://dx.doi.org/10.1103/PhysRevB.85.045401
Export this item as:	BibTeX EndNote HTML Citation Reference Manager

Show download statistics for this publication

Repository Staff Only: item control page

Metis ID: 286923