Photoinduced IR absorption in (La(1-x)Sr(x)Mn)(1-δ)O3: changes of the anti-Jahn-Teller polaron binding energy with doping

Abstract

Photoinduced IR absorption was measured in (La(1-x)Sr(x)Mn)(1-δ)O3. A midinfrared peak centered at ~ 5000 cm${}^{-1}$ was observed in the x=0 antiferromagnetic sample. The peak diminishes and softens as hole doping is increased. The origin of the photoinduced absorption peak is atributted to the photon assisted hopping of anti-Jahn-Teller polarons formed by photoexcited charge carriers, whose binding energy decreases with increasing hole doping. The shape of the peak indicates that the polarons are small.

5 pages, 3 figures, submitted to PRB

References in corpus (3)

• Optical Conductivity of Manganites: Crossover from Jahn-Teller Small Polaron to Coherent Transport in the Ferromagnetic State
• Optical Investigations of La_{7/8}Sr_{1/8}MnO_3
• A Scaling Behavior of Spectral Weight Changes in Perovskite Manganites La_{0.7-y}Pr_{y}Ca_{0.3}MnO_3

Cited by in corpus (7)

• Interplay of p-d and d-d charge transfer transitions in rare-earth perovskite manganites
• Disproportionation and electronic phase separation in parent manganite LaMnO_3
• Hole interactions with molecular vibrations on DNA
• Lattice-Mediated Magnetic Order Melting in TbMnO3
• Localization by disorder in the infrared conductivity of (Y,Pr)Ba2Cu3O7 films
• Local polarization in oxygen-deficient LaMnO${}_3$ induced by charge localization in the Jahn-Teller distorted structure
• Excitations across the equilibrium and photoinduced `hidden' states of magnetoresistive manganites