Charge, Spin, and Lattice Excitations in Double-Layer Manganites
D B. Romero, H D. Drew, J.F. Mitchell, Y Moritomo
A Raman-scattering investigation of the double-layer manganites, La2-2rSr1+2rMn2O7 (x= 0.4,0.5), revealed signatures of a ) charge stripe formation and melting, b)small polaron formation, and c) anisotropic quasiparticle dynamics in the ferromagnetic-metallic state. These observations and their implications and their implications are discussed in this work.