Spectroscopic evidence for polaronic behaviour of the strong spin-orbit insulator Sr${}_3$Ir${}_2$O${}_7$

P. D. C. King, T. Takayama, A. Tamai +9

We investigate the bilayer Ruddlesden-Popper iridate Sr${}_3$Ir${}_2$O${}_7$ by temperature-dependent angle-resolved photoemission. We find a narrow-gap correlated insulator, with spectr…