Highly efficient and fast modulation of magnetic coupling interaction in the SrCoO/LaCaMnO heterostructure.

Effective manipulation of magnetic properties in transition-metal oxides is one of the crucial issues for the application of materials. Up to now, most investigations have focused on electrolyte-based ionic control, which is limited by the slow speed. In this work, the interfacial coupling of the SrCoO/LaCaMnO (LCMO) bilayer is effectively modulated with fast response time.

Manipulating the metal-to-insulator transitions of VO by combining compositing and doping strategies.

Vanadium dioxide (VO) exhibits the most abrupt metal-to-insulator transition (MIT) property near room temperature among the representative 3d-orbital correlated oxides, and its structural variation during the MIT usually results in poor mechanical properties as bulk pellets. Moreover, compositing with highly resistive oxides has been reported to improve the mechanical strength of bulk VO since the generation and propagation of microcracks is suppressed upon thermocycling across the MIT; further, their respective impacts on electrical transportation are yet unclear. Herein, we demonstrate the role of these highly resistive oxide composites (, HfO, CoO and AlO) in reducing charge leakage along the microcracks within the insulating phase of VO, leading to more abrupt MIT properties from the perspective of electrical transportation.

Revealing the Role of Hydrogen in Electron-Doping Mottronics for Strongly Correlated Vanadium Dioxide.

Hydrogen-associated electron-doping Mottronics for d-band correlated oxides (e.g., VO) opens up a new paradigm to regulate the electronic functionality via directly manipulating the orbital configuration and occupancy.