Superconductivity from flat dispersion designed in doped mott insulators

Masatoshi Imada, Masanori Kohno

研究成果: Article査読

48 被引用数 (Scopus)

抄録

Routes to enhance superconducting instability are explored for doped Mott insulators. With the help of insight for criticalities of metal-insulator transitions, geometrical design of lattice structure is proposed to control the instability. A guideline is to explicitly make flat band dispersions near the Fermi level without suppressing two-particle channels. In a one-dimensional model, numerical studies show that our prescription with finite-ranged hoppings realizes large enhancement of spin-gap and pairing dominant regions. We also propose several multiband systems, where the pairing is driven by intersite Coulomb repulsion.

本文言語English
ページ(範囲)143-146
ページ数4
ジャーナルPhysical Review Letters
84
1
DOI
出版ステータスPublished - 2000
外部発表はい

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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