High permittivity materials find extensive use in high frequency communications devices due to their small size (compared to lumped element circuits), low losses and physical robustness. Recently, these types of materials have been applied in high field magnetic resonance imaging, based upon earlier work in electron paramagnetic resonance. This review article describes the basic properties of h...

Topological states of matter possess bulk electronic structures categorized by topological invariants and edge/surface due to the bulk-boundary correspondence. materials hold great potential in development dissipationless spintronics, information storage quantum computation, particularly if combined with magnetic order intrinsically or extrinsically. Here, we review recent progress exploration ...