Bibliographic Details
| Title: |
Oxygen vacancies in strained SrTiO$_{3}$ thin films: formation enthalpy and manipulation |
| Authors: |
Iglesias, L., Sarantopoulos, A., Magen, C., Rivadulla, F. |
| Publication Year: |
2017 |
| Collection: |
Condensed Matter |
| Subject Terms: |
Condensed Matter - Materials Science |
| More Details: |
We report the enthalpy of oxygen vacancy formation in thin films of electron-doped SrTiO$_{3}$, under different degrees of epitaxial stress. We demonstrate that both compressive and tensile strain decrease this energy at a very similar rate, and promote the formation of stable doubly ionized oxygen vacancies. Moreover, we also show that unintentional cationic vacancies introduced under typical growth conditions, produce a characteristic rotation pattern of TiO$_6$ octahedra. The local concentration of oxygen vacancies can be modulated by an electric field with an AFM tip, changing not only the local electrical potential, but also producing a non-volatile mechanical response whose sign (up/down) can be reversed by the electric field.
Comment: Physical Review B (accepted for publication) |
| Document Type: |
Working Paper |
| DOI: |
10.1103/PhysRevB.95.165138 |
| Access URL: |
http://arxiv.org/abs/1704.05620 |
| Accession Number: |
edsarx.1704.05620 |
| Database: |
arXiv |
