Electronic structure of one-dimensional cuprates

K. Maiti, D. Sarma, T. Mizokawa, A. Fujimori

研究成果: Article査読

37 被引用数 (Scopus)

抄録

We have investigated the electronic structures of one-dimensional antiferromagnetic insulators (Formula presented) and (Formula presented) combining electron spectroscopic measurements and various calculations. While calculations based on a local-spin-density approach for the real magnetic structures fail to yield an insulating state, from our experiments we estimate the intrinsic band gaps in these materials to be about 1.7 eV (Formula presented) and 1.5 eV (Formula presented). Analysis of the core-level and the valence-band spectra in terms of model many-body Hamiltonians show that the charge-transfer energy (Formula presented) for these one-dimensional systems is significantly smaller than other cuprates, such as the high-(Formula presented) oxides (two-dimensional) and CuO (three-dimensional). Such a small (Formula presented) suggests the presence of the bare upper Hubbard band within the oxygen (Formula presented) bandwidth and thus provides an example of a correlated covalent insulator.

本文言語English
ページ(範囲)1572-1578
ページ数7
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
57
3
DOI
出版ステータスPublished - 1998
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

フィンガープリント

「Electronic structure of one-dimensional cuprates」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル