Anomalous excitons and screenings unveiling strong electronic correlations in SrTi${}_{1-x}$Nb${}_x$O${}_3$, 0$\le$x$\le$0.005

Pranjal Kumar Gogoi, Lorenzo Sponza, Daniel Schmidt +8

Electron-electron (e-e) and electron-hole (e-h) interactions are often associated with many exotic phenomena in correlated electron systems. Here, we report an observation of anoma…