Detailed Structure of the Magnetic Excitation Spectra of YBa 2Cu 3O y and Its Implication on the Physical Characteristics of the Electron System

Masafumi Ito, Hiroshi Harashina, Yukio Yasui, Masaki Kanada, Satoshi Iikubo, Masatoshi Sato, Akito Kobayashi, Kazuhisa Kakurai

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18 Citations (Scopus)

Abstract

Detailed structure of the magnetic excitation spectra χ″(q, ω) of the superconducting oxide YBa 2Cu 3O 6.5 (the transition temperature T c ≅ 52K) in the wave vector (q)- and the energy(ω)-space, and its temperature (T) dependence have been studied. By adopting an effective energy dispersion of the quasi particles which can reproduce the shape of the Fermi surface and by introducing the exchange interaction between the Cu spins, a rather satisfactory agreement between the calculation and the experimentally observed data can be obtained. In the study, it has been found that the effects of the quasi particle-energy broadening on the excitation spectra χ″ (q,ω) is important. The sharp resonance peak observed at w ∼ 40 meV for the optimally doped system of YBa 2Cu 3O y can be naturally reproduced by the present model.

Original languageEnglish
Pages (from-to)265-270
Number of pages6
Journaljournal of the physical society of japan
Volume71
Issue number1
DOIs
Publication statusPublished - Jan 2002
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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