A correlated insulator at the surface of the polar metal Ca${}_3$Ru${}_2$O${}_7$

Daniel Halliday, Izidor Benedičič, Andela Zivanovic +10

We investigate the electronic structure at the surface of the correlated oxide Ca${}_3$Ru${}_2$O${}_7$, a low-symmetry ruthenate oxide which hosts an unconventional polar-metal phase. Fr…