Spin Dimer State Model and Spin-Phonon Coupling Model of Superconductivity

Masatoshi Imada

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49 Citations (Scopus)

Abstract

A mechanism of superconductivity coming from the doping of mobile fermions into the spin dimerized insulator such as spin Peierls state, valence bond glass, Heisenberg spins with next nearest neighbor exchange coupling and the Haldane gap state is discussed. The doping of fermions with narrow band into a Mott insulator with a spin gap results in the superconducting long range order in two- and three-dimensions, while results in the power law divergence of the pairing susceptibility with Tomonaga-Luttinger liquid character of charge in one-dimension. An example of numerical calculation in one-dimension is shown. The possible relevance of this mechanism to high-temperature superconductivity, where dynamical coupling of lattice distortion to spin may play a crucial role, is discussed. A relevant model Hamilto-nian with spin-phonon coupling and dynamical spin-Peierls fluctuation is proposed.

Original languageEnglish
Pages (from-to)1877-1880
Number of pages4
JournalJournal of the Physical Society of Japan
Volume60
Issue number6
DOIs
Publication statusPublished - 1991 Jan 1
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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