Hole stripe and orbital fluctuating state in LaMnO${}_{3+\delta }$ ($0.085\le \delta \le 0.125$) unveiled by Raman spectroscopy

Yu. G. Pashkevich, V. P. Gnezdilov, P. Lemmens +8

Giant softening by 30 cm${}^{-1}$ of the 490- and 620-cm${}^{-1}$ modes is observed by Raman scattering measurements below the Curie temperature of single crystalline LaMnO${}_{3+\delta }$ ($0…