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Driving mechanisms behind the various phases in manganese perovskites revealed by Mn 2p resonance photoemission

A. Sekiyama·H. Fujiwara·A. Higashiya·S. Imada·H. Kuwahara·Y. Tokura·S. Suga
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Abstract

Unusual temperature and doping dependence of the Mn 3d spectral functions of manganese perovskites Nd1-xSrxMnO3 has been revealed by the high-resolution Mn 2p-3d resonance photoemission. The temperature-dependent spectra cannot be explained by any theoretical model currently under debate, while showing evidence for a microscopic and dynamic phase segregation. The experimental results strongly suggest that the competition of both the dynamical and static Jahn-Teller effects with ferromagnetic ordering at high and low temperatures, respectively, is responsible for the actual electronic states.

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A. Sekiyama, H. Fujiwara, A. Higashiya, S. Imada, H. Kuwahara, Y. Tokura, S. Suga. 2004-01-29. Driving mechanisms behind the various phases in manganese perovskites revealed by Mn 2p resonance photoemission. https://arxiv.org/abs/cond-mat/0401601

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