Role of antiferromagnetic fluctuations in the temperature dependence of the linewidth of the transitions between the crystal-field levels in high-Tc superconductors

V. L. Aksenov, V. V. Kabanov

Research output: Article

12 Citations (Scopus)

Abstract

The measurements of linewidth of the transitions between 4f levels of Tm split by the crystal field in Y-Ba-Cu-O compounds are analyzed using the spin-wave approximation and the phenomenological approach of Millis, Monien, and Pines. It was shown that in the insulating state the main contribution to the linewidth arises from one-magnon processes and a gap in the spectrum of magnetic excitation is rather small (Δ<100 K). In superconducting compounds the main contribution to the linewidth arises from zone-center magnetic fluctuations and the temperature dependence of the linewidth is determined by static spin susceptibility.

Original languageEnglish
Pages (from-to)3524-3527
Number of pages4
JournalPhysical Review B
Volume49
Issue number5
DOIs
Publication statusPublished - jan. 1 1994

ASJC Scopus subject areas

  • Condensed Matter Physics

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