Atomic resolution scanning transmission electron microscopy and electron energy loss spectroscopy combined with ab initio electronic calculations are used to determine the structure and properties of the Fe3O4(111)/SrTiO3(111) polar interface. The interfacial structure and chemical composition are shown to be atomically sharp and of an octahedral Fe/SrO3 nature. Band alignment across the interf...

We report transport measurements through graphene on SrTiO3 substrates as a function of magnetic field B, carrier density n, and temperature T. The large dielectric constant of SrTiO3 very effectively screens long-range electron-electron interactions and potential fluctuations, making Dirac electrons in graphene virtually noninteracting. The absence of interactions results in an unexpected beha...

We study the effect of the surface adsorption of a variety of common laboratory solvents on the conductivity at the interface between LaAlO3 and SrTiO3. This interface possesses a range of intriguing physics, notably a proposed connection between the surface state of the LaAlO3 and the conductivity buried in the SrTiO3. We show that the application of chemicals such as acetone, ethanol, and wat...

The fabrication and control of the conductive surface and interface on insulating SrTiO3 bulk provide a pathway for oxide electronics. The controllable manipulation of local doping concentration in semiconductors is an important step for nano-electronics. Here we show that conductive patterns can be written on bare SrTiO3 surface by controllable doping in nanoscale using the mechanical interact...

The current work deals with the synthesis and characterization of strontium titanate (SrTiO3) nanoparticles reinforced polyvinyl chloride (PVC) polyvinylidene fluoride (PVDF) blend nanocomposite films prepared via a solution casting approach. structural, thermal, morphological characteristics PVC/PVDF/SrTiO3 were explored through Fourier transform infrared spectroscopy- FTIR, X-ray diffraction–...

The thermodynamically stable (2 1), c(4 2) and c(6 2) surface structures were obtained under oxidative conditions on the SrTiO3(0 0 1) surface and studied with transmission electron microscopy. All three reconstructed surfaces exhibit similar morphological features––formation of flat h100i facets on the surface, stabilization of h110i originally polar facets as well as the existence of surface ...

Results of ab initio Hartree-Fock calculations for the SrTiO3 ~110! polar surface are discussed. We have calculated the surface energies, near-surface atomic displacements for four possible terminations ~TiO, Sr, and two kinds of O terminations! as well as Mulliken atomic charges and dipole moments of atoms characterizing their polarization, and the atomic bond populations. We predict a conside...

In this work, the functional character of complex α-Fe2O3(0001)/SrTiO3(111) and Au(111) islands/α-Fe2O3(0001)/SrTiO3(111) heterostructures has been proven as gas sensors at room temperature. Epitaxial Au islands α-Fe2O3 thin film are grown by pulsed laser deposition on SrTiO3(111) substrates. Intrinsic parameters such composition, particle size epitaxial investigated for their influence sensing...

Recent interest in SrTiO3 stems from its wide applicability in microwave devices based on the tunable characteristics of dielectric constant in the microwave frequency range. It is obvious that for any such application, SrTiO3 should have a ferroelectric Curie temperature (TC) close to room temperature or higher. By inducing strains by chemical substitutions, it was possible to obtain TC as hig...

Heteroepitaxy of complex oxide thin films is a significant challenge when large mismatch in the lattice parameters (>8%) and difference crystallographic symmetry coexist between film substrate. Herein, heteroepitaxial growth hexagonal delafossite CuFeO2 with (00.1) orientation on cubic perovskite (001) SrTiO3 substrate through translational rotational domain matching epitaxy reported. The in-pl...