Nonlinear optical response in a ferromagnetic insulating manganite: Pr_0.8Ca_0.2MnO₃

2025/01/24 by Nakano, A., Uchida, K., Tomioka, Y. +3
#FOS: Physical sciences #Strongly Correlated Electrons (cond-mat.str-el)

paper · doi:10.48550/arxiv.2501.14181

Abstract

High harmonic generation from Pr_0.8Ca_0.2MnO₃ was investigated across a high-temperature paramagnetic phase and a low-temperature ferromagnetic phase. As the temperature decreases, the harmonic intensity gradually increases in the paramagnetic phase like that in different composition material Pr_0.6Ca_0.4MnO₃. However, it turns to a decrease in the ferromagnetic phase. We propose a possible interpretation of the anomaly around the ferromagnetic transition temperature considering the thermal fluctuation of orbital order and the metal-insulator phase separation in the ferromagnetic insulating phase.

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