Rocksalt-type heavy rare earth monoxides TbO, DyO, and ErO exhibiting metallic electronic states and ferromagnetism.

Solid-phase rare earth monoxides have been recently synthesized thin film epitaxy. However, it has been difficult to synthesize heavy rare earth monoxides owing to their severe chemical instability. In this study, rocksalt-type heavy rare earth monoxides REOs (RE = Tb, Dy, Er) were synthesized for the first time, as single-phase epitaxial thin films.

Surface terminations control charge transfer from bulk to surface states in topological insulators.

Topological insulators (TI) hold significant potential for various electronic and optoelectronic devices that rely on the Dirac surface state (DSS), including spintronic and thermoelectric devices, as well as terahertz detectors. The behavior of electrons within the DSS plays a pivotal role in the performance of such devices. It is expected that DSS appear on a surface of three dimensional(3D) TI by mechanical exfoliation.

Large Perpendicular Magnetic Anisotropy Induced by an Intersite Charge Transfer in Strained EuVOH Films.

Perovskite oxides O continue to be a major focus in materials science. Of particular interest is the interplay between and cations as exemplified by intersite charge transfer (ICT), which causes novel phenomena including negative thermal expansion and metal-insulator transition. However, the ICT properties were achieved and optimized by cationic substitution or ordering.

Resonant tunneling driven metal-insulator transition in double quantum-well structures of strongly correlated oxide.

The metal-insulator transition (MIT), a fascinating phenomenon occurring in some strongly correlated materials, is of central interest in modern condensed-matter physics. Controlling the MIT by external stimuli is a key technological goal for applications in future electronic devices. However, the standard control by means of the field effect, which works extremely well for semiconductor transistors, faces severe difficulties when applied to the MIT.

Creation of a binuclear purple copper site within a de novo coiled-coil protein.

Although various kinds of metal binding proteins have been constructed by de novo design, the creation of a binuclear metal binding site remains especially challenging. The purple copper site in subunit II of COX, referred to as the Cu(A) site, has two copper ions bridged by two Cys residues. We constructed the Cu(A) site consisting of two Cys and two His residues in a de novo designed four-helical coiled-coil protein.