Superconductor films convert heat into electricity

Films of a superconductor show excellent thermoelectric properties at very low film thicknessesWhen thinned down to a sheet a few atoms thick, the superconductor iron selenide (FeSe) can efficiently convert heat into electricity, researchers at RIKEN have discovered1. This opens up the possibility that similar multifunctionality may be lurking in other two-dimensional materials.
Ultrathin films often behave quite differently from the same material in bulk form. For example, bulk FeSe superconduc