Itinerant-localized duality description of the spin fluctuations in the normal state of high-Tc cuprates. An explanation of neutron scattering experiments

O. Narikiyo, K. Miyake

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

On the basis of the itinerant-localized duality theory of spin fluctuations, the puzzling aspects of the neutron scattering experiments in the normal state of high-Tc cuprates are clarified from a global point of view. The dynamical spin structure factor exhibits two different aspects depending on the energy transfer ω. At lower energies, ω < ωc, where ωc is the fermion coherence energy, the spectrum is coherent so that the characteristic scales for wavevector and energy are temperature dependent, while at higher energies, ω > ωc, the spectrum is incoherent so that those characteristic scales are temperature independent. The integrated weight of the coherent part of the spectrum exhibits the so-called "spin gap" behavior when the Fermi surface of the itinerant fermion is technically nested, even though there is no excitation gap in the spectrum at all.

Original languageEnglish
Pages (from-to)295-300
Number of pages6
JournalPhysica C: Superconductivity and its applications
Volume250
Issue number3-4
DOIs
Publication statusPublished - Aug 15 1995
Externally publishedYes

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Temperature scales
Spin fluctuations
Fermi surface
Fermions
Neutron scattering
Energy transfer
cuprates
neutron scattering
temperature scales
Experiments
Fermi surfaces
fermions
energy transfer
excitation
energy

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

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