Superconductivity from flat dispersion designed in doped mott insulators

Masatoshi Imada, Masanori Kohno

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)143-146
Number of pages4
JournalPhysical Review Letters
Volume84
Issue number1
DOIs
Publication statusPublished - 2000 Jan 1

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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