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Room-temperature ferroelectricity in strained SrTiO3
It is shown that epitaxial strain from a newly developed substrate can be harnessed to increase Tc by hundreds of degrees and produce room-temperature ferro electricity in strontium titanate, a material that is not normally ferroelectric at any temperature.
Observation of conducting filament growth in nanoscale resistive memories.
- Yuchao Yang, P. Gao, Siddharth Gaba, Ting Chang, Xiaoqing Pan, W. Lu
- PhysicsNature communications
- 13 March 2012
It is found that the filament growth can be dominated by cation transport in the dielectric film, and two different growth modes were observed for the first time in materials with different microstructures.
A Thin Film Approach to Engineering Functionality into Oxides
The broad spectrum of electronic and optical properties exhibited by oxides offers tremendous opportunities for microelectronic devices, especially when a combination of properties in a single device…
Experimental evidence of ferroelectric negative capacitance in nanoscale heterostructures
We report a proof-of-concept demonstration of negative capacitance effect in a nanoscale ferroelectric-dielectric heterostructure. In a bilayer of ferroelectric Pb(Zr0.2Ti0.8)O3 and dielectric…
Spontaneous vortex nanodomain arrays at ferroelectric heterointerfaces.
This first observation of spontaneous vortex nanodomain arrays at ferroelectric heterointerfaces reveals properties unlike the surrounding film including mixed Ising-Néel domain walls, which will affect switching behavior, and a drastic increase of in-plane polarization.
Electrochemical dynamics of nanoscale metallic inclusions in dielectrics.
It is demonstrated that nanoscale inclusions in dielectrics dynamically change their shape, size and position upon applied electric field, revealing the microscopic origin behind resistive switching, and providing general guidance for the design of novel devices involving electronics and ionics.
Controlled Synthesis of Lead-Free and Stable Perovskite Derivative Cs2SnI6 Nanocrystals via a Facile Hot-Injection Process
Colloidal nanocrystals of lead halide perovskites have recently received great attention due to their remarkable performance in optoelectronic applications (e.g., light-emitting devices, flexible…
Revealing the role of defects in ferroelectric switching with atomic resolution.
It is found that the intrinsic electric fields formed at ferroelectric/electrode interfaces determine the nucleation sites and growth rates of ferro electric domains and the orientation and mobility of domain walls, whereas dislocations exert a weak pinning force on domain wall motion.
In situ epitaxial MgB2 thin films for superconducting electronics
Here it is shown that an in situ process in which MgB2 is formed directly on the substrate is desirable and can be achieved by hybrid physical–chemical vapour deposition, and this advance removes a major barrier for superconducting electronics using M gB2.
Surface-Engineered PtNi-O Nanostructure with Record-High Performance for Electrocatalytic Hydrogen Evolution Reaction.
- Zipeng Zhao, Haotian Liu, Yu Huang
- Materials ScienceJournal of the American Chemical Society
- 7 July 2018
The surface-engineered PtNi-O nanoparticles with enriched NiO/PtNi interface on surface with significantly improved stability as well as high current performance which are well over those of the commercial Pt/C and demonstrated capability of scaled hydrogen generation.