Optical Investigations of Charge Gap in Orbital Ordered La1/2Sr3/2MnO4

Details Optical Investigations of Charge Gap in Orbital Ordered La1/2Sr3/2MnO4 Optical Investigations of Charge Gap in Orbital Ordered La1/2Sr3/2MnO4

1999-03-22

arxiv.org/abs/cond-mat/9903322v1

Physics

Condensed Matter

Strongly Correlated Electrons

10 pages, 4 figures

Scientific paper

10.1103/PhysRevB.61.6902

Temperature and polarization dependent electronic structure of La1/2Sr3/2MnO4 were investigated by optical conductivity analyses. With decreasing temperature, for E//ab, a broad mid-infrared (MIR) peak of La1/2Sr3/2MnO4 becomes narrower and moves to the higher frequency, while that of Nd1/2Sr3/2MnO4 nearly temperature independent. We showed that the MIR peak in La1/2Sr3/2MnO4 originates from orbital ordering associated with CE-type magnetic ordering and that the Jahn-Teller distortion has a significant influence on the width and the position of the MIR peak.

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