Affordable Access

Publisher Website

A real space pair model for the NMR behavior in high-Tccuprates

Authors
Journal
Physica C Superconductivity
0921-4534
Publisher
Elsevier
Publication Date
Volume
211
Identifiers
DOI: 10.1016/0921-4534(93)90731-5
Disciplines
  • Physics

Abstract

Abstract A model for real space singlet pairs (RSP), hopping on the quasi 2D antiferromagnetic background of localized spins, is presented. It is found that the “gas parameter” of the RSP's reaches unity at low enough temperatures, however small the concentration of RSP's. This happens due to the local coupling of the RSP to the growing antiferromagnetic fluctuations in the 2D magnetic layers. The low temperature increase of the magnetic correlation length ξ is suppressed significantly by the low energy density fluctuations in the quasi 2D RSP system, which develop already far above the Bose condensation temperature T c. The effective “magnetic mass” of the RSP is found to be proportional to (In ξ/ a) 2, where a is the magnetic lattice spacing. Both the magnetic energy shift and the size of the “magnetic cloud” of the RSP are calculated. The results are applied to the explanation of the NMR behavior observed in the high- T c cuprates.

There are no comments yet on this publication. Be the first to share your thoughts.

Statistics

Seen <100 times
0 Comments

More articles like this

A real-space pair model for the NMR behaviour in h...

on Journal of Physics and Chemist... Jan 01, 1993

A Cu d-d excitation model for the pairing in the h...

on Physica C Superconductivity Jan 01, 1988

Restricted pair tunneling model in the context of...

on Physica C Superconductivity Jan 01, 1998

NMR decoration study of the mixed state in high-Tc...

on Physica C Superconductivity Jan 01, 1996
More articles like this..