Persistence of High-Frequency Spin Fluctuations in Overdoped Superconducting La2-xSrxCuO4 (x=0.22)

OJ Lipscombe, SM Hayden, B Vignolle, DF McMorrow, TG Perring

Research output: Contribution to journalArticle (Academic Journal)

66 Citations (Scopus)

Abstract

We report a detailed inelastic neutron scattering study of the collective magnetic excitations of overdoped superconducting La1.78Sr0.22CuO4 for the energy range 0-160 meV. Our measurements show that overdoping suppresses the strong response present for optimally doped La2-xSrxCuO4 which is peaked near 50 meV. The remaining response is peaked at incommensurate wave vectors for all energies investigated. We observe a strong high-frequency magnetic response for E80 >~ meV suggesting that significant antiferromagnetic exchange couplings persist well into the overdoped part of the cuprate phase diagram.
Translated title of the contributionPersistence of High-Frequency Spin Fluctuations in Overdoped Superconducting La2-xSrxCuO4 (x=0.22)
Original languageEnglish
Pages (from-to)1 - 4
Number of pages4
JournalPhysical Review Letters
Volume99 (6, 067002)
DOIs
Publication statusPublished - Aug 2007

Bibliographical note

Publisher: American Physical Society

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