Opening of a correlation-induced band gap in NiS

M. Nakamura, A. Sekiyama, H. Namatame, H. Kino, A. Fujimori, A. Misu, H. Ikoma, M. Matoba, S. Anzai

研究成果: Article査読

30 被引用数 (Scopus)

抄録

We have measured high-resolution photoemission spectra of NiS, which undergoes a nonmetal-metal transition at Tt260 K. Below Tt, a small band gap opens; the band edge is essentially a step function broadened only by 15 meV. This observation is difficult to reconcile with one-electron band theory, which predicts a much broader band edge, implying a dramatic influence of electron correlation on quasiparticle excitations and on the opening of a band gap in 3D antiferromagnetic insulators.

本文言語English
ページ(範囲)2891-2894
ページ数4
ジャーナルPhysical review letters
73
21
DOI
出版ステータスPublished - 1994

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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