Topological insulators are one of the most puzzling quantum materials. Their edges are electron superhighways where electrons flow with no loss, while the bulk of the material blocks electron flow - ...

A new study has found evidence of a new phase of matter predicted in the 1960s: the excitonic insulator, which has been keenly pursued by condensed matter physicists and 2D material scientists. The ...

A new method by Penn State researchers conveniently changes the direction of electron flow in materials that exhibit the quantum anomalous Hall (QAH) effect — a phenomenon in which the flow of ...