Topological superconductivity is an exotic state of matter that
supports Majorana zero-modes, which have been predicted to occur in
the surface states of three-dimensional systems, in the edge states of
two-dimensional systems, and in onedimensional wires. Localized
Majorana zero-modes obey non-Abelian exchange statistics, making them
interesting building blocks for topological quantum computing. Here,
we report superconductivity induced in the edge modes of
semiconducting InAs/GaSb quantum wells, a two-dimensional topological
insulator. Using superconducting quantum interference we demonstrate
gate-tuning between edge-dominated and bulk-dominated regimes of
superconducting transport. The edge-dominated regime arises only under
conditions of high-bulk resistivity, which we associate with the
two-dimensional topological phase. These experiments establish
InAs/GaSb as a promising platform for the confinement of Majoranas
into localized states, enabling future investigations of non-Abelian
statistics.

LaMn3Cr4Owith cubic symmetry is a novel spin-driven multiferroic system with strong magnetoelectric coupling effects. When a magnetic field is applied in parallel (perpendicular) to an electric field, the ferroelectric polarization can be enhanced (suppressed) significantly. The unique multiferroic phenomenon observed in this cubic perovskite cannot be understood by conventional spin-driven microscopic mechanisms. Instead, a nontrivial effect involving the interactions between two magnetic sublattices is likely to play a crucial role.