Xinyue Wang

Ruthenium oxide has long been regarded as a textbook altermagnet — a material where magnetic moments of neighboring atoms point in opposite directions but do not fully cancel due to the crystal's special symmetry. New measurements show that inside the crystal, there is no magnetism at all. All the magnetic action is confined to the surface.

A tongue tumor is like a stranger in a crowd. On the surface, they all look much alike, but beneath the surface hide very different personalities. Some tumors behave aggressively, others grow slowly. Doctors need to understand who they're dealing with before surgery. Usually, this means taking a tissue sample — a biopsy.