Ti K and Ti L2,3 edge x-ray absorption fine-structure near-edge spectra of SrTiO3 thin films grown coherently on Si(001) reveal the presence of a ferroelectric (FE) distortion at room temperature. This unique phase is a direct consequence of the compressive biaxial strain achieved by coherent epitaxial growth. Comparisons with first-principles calculations support this conclusion.
Citation: Physical Review Letters
Pub Type: Journals
ferroelectric (FE) distortion, lattice constants, perovskites, SrTiO3