Pu Yu

TL;DR: A fundamentally different mechanism for photovoltaic charge separation is reported, which operates over a distance of 1-2 nm and produces voltages that are significantly higher than the bandgap.

TL;DR: The observation of room-temperature electronic conductivity at ferroelectric domain walls in the insulating multiferroic BiFeO(3) shows that the conductivity correlates with structurally driven changes in both the electrostatic potential and the local electronic structure, which shows a decrease in the bandgap at the domain wall.

TL;DR: This article can reversibly switch between two distinct exchange-bias states by switching the ferroelectric polarization of BiFeO(3), an important step towards controlling magnetization with electric fields, which may enable a new class of electrically controllable spintronic devices and provide a new basis for producing electrically controlled spin-polarized currents.

TL;DR: The enhancement in the dielectric properties suggests that the strategy for optimizing a ceramic solid solution enables the design of better high- performance capacitors and should be generalizable for designing high-performance dielectrics and other functional materials that benefit from nanoscale domain structure manipulation.

TL;DR: It is shown that controlling the insertion and extraction of oxygen and hydrogen ions independently of each other can direct reversible phase transformations among three different material phases, opening up opportunities for the electric-field control of multistate phase transformations with rich functionalities.