Optical spectroscopy of the metal-insulator transition in NdNiO3

T. Katsufuji, Y. Okimoto, T. Arima, Y. Tokura, J. B. Torrance

研究成果: Article

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We report optical measurements of NdNiO3 that undergo a phase transition from a paramagnetic metal to an antiferromagnetic insulator at 200 K (=Tc). The opening of a charge gap is observed in the optical conductivity spectrum [σ(ω)] below Tc, and the missing spectral weight is distributed over the energy region above 0.3 eV. The evolution of the gap below Tc is rather gradual with temperature, in contrast to sharp changes of lattice parameters and resistivity at Tc. Such a feature in the σ(ω) spectrum of NdNiO3 is characteristic of a spin-density-wave (SDW) state, though the peak energy (∼0.4 eV) of the σ(ω) spectrum is considerably larger than that predicted by a simple SDW theory. The effect of electron correlation is discussed on the basis of the σ(ω) spectra.

元の言語English
ページ(範囲)4830-4835
ページ数6
ジャーナルPhysical Review B
51
発行部数8
DOI
出版物ステータスPublished - 1995 1 1
外部発表Yes

ASJC Scopus subject areas

  • Condensed Matter Physics

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