Strongly correlated model of acousticlike plasmons persisting across the phase diagram of cuprate superconductors

Luciano Zinni, Hiroyuki Yamase, Matthias Hepting +2

Layered two-dimensional electron systems exhibit both optical and acousticlike plasmons around the Brillouin-zone center. In the layered cuprate La${}_{2-x}$Sr${}_x$CuO${}_4$, resonant i…