Low-energy electron diffraction (LEED), atomic force microscopy (AFM), and X-ray diffraction (XRD) have been used to investigate the structural and morphological character of a naturally chiral ceramic SrTiO3(621) substrate and of Pt and Cu thin films deposited on its surface. AFM experiments showed that as-received chirally-oriented SrTiO3(621) substrates display atomically smooth surface morp...

Three different film systems have been systematically investigated to understand the effects of strain and substrate constraint on the phase transitions of perovskite films. In SrTiO3 films, the phase transition temperature Tc was determined by monitoring the superlattice peaks associated with rotations of TiO6 octahedra. It is found that Tc depends on both SrTiO3 film thickness and SrRuO3 buff...

Nanophotonic devices seek to generate, guide, and/or detect light using structures whose nanoscale dimensions are closely tied to their functionality.1,2 Semiconducting nanowires, grown with tailored optoelectronic properties, have been successfully placed into devices for a variety of applications.3–5 However, the integration of photonic nanostructures with electronic circuitry has always been...

This study demonstrates a numerical model for interfacial switching memristors based on the Schottky barrier height modulation mechanism. A resistive contact is formed an n-type semiconductor and high work-function metal (e.g., strontium titanate platinum). The resistance determined by height, which influenced concentration of oxygen vacancies serving as space charges. Accordingly, spatial dist...

H2 and O2 were produced in a twin reactor with two compartments divided by a Nafion membrane. Ce3+ and Ce4+ are adopted as redox mediator, which transferred the electron and holes between H2-evolving catalyst(Pt/SrTiO3:Rh) and O2 evolving catalyst (BiVO4). The optimal pH in the twin reactor was 1. Water splitting under Ce3+/Ce4+ equilibrium concentrations between two compartments gave the highe...

Interfacial two-dimensional electron gas (2DEG), especially the SrTiO3-based ones at unexpected interface of insulators, have emerged to be a promising candidate for efficient charge-spin current interconversion. In this article, gain insight into mechanism interconversion oxide-based 2DEG, we focused on conducting interfaces between insulating SrTiO3 and two types aluminium-based amorphous nam...

Two types of bipolar resistance switching with eightwise and counter eightwise polarities are observed to coexist in Au/SrTiO3/Ti memory cells. These two types of switching can be induced by different defect distributions which are activated by controlling the electric process. The analyses of I-V and C-V data reveal that the resistance switching with eightwise polarity originates from the chan...

Using a near-field scanning optical microscope capable of quantitative polarimetry, we map the anisotropic strain fields associated with individual submicron defects near the fusion boundaries of SrTiO3 bicrystals. Many defects exhibit unexpected spiral-shape strain patterns, whose handedness is believed to be linked to the bicrystal synthesis process. Direct observation of these defect-induced...

We investigate the oxygen octahedral rotations that occur in two perovskites, SrTiO3 and PbTiO3, as a function of applied three-dimensional electric displacement field, allowing us to map out the phase diagram of rotations in both the paraelectric and ferroelectric regions of the polar response. First-principles calculations at fixed electric displacement field are used to extract parameters of...