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

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

doi:10.1103/PhysRevLett.99.067002

Persistence of High-Frequency Spin Fluctuations in Overdoped Superconducting La_2-xSr_xCuO₄ (x=0.22)

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

School of Physics

Research output: Contribution to journal › Article (Academic Journal) › peer-review

83 Citations (Scopus)

Abstract

We report a detailed inelastic neutron scattering study of the collective magnetic excitations of overdoped superconducting La_1.78Sr_0.22CuO₄ for the energy range 0-160 meV. Our measurements show that overdoping suppresses the strong response present for optimally doped La_2-xSr_xCuO₄ 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 contribution	Persistence of High-Frequency Spin Fluctuations in Overdoped Superconducting La_2-xSr_xCuO₄ (x=0.22)
Original language	English
Pages (from-to)	1 - 4
Number of pages	4
Journal	Physical Review Letters
Volume	99 (6, 067002)
DOIs	https://doi.org/10.1103/PhysRevLett.99.067002
Publication status	Published - Aug 2007

Bibliographical note

Publisher: American Physical Society

Access to Document

10.1103/PhysRevLett.99.067002

http://link.aps.org/abstract/PRL/v99/e067002

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PARTNERSHIP FUNDING: NOVEL QUANTUM ORDER IN INTERACTING ELECTRON METALS
Hayden, S. M. (Principal Investigator)
1/10/04 → 1/10/09
Project: Research

Cite this

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

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 >\textasciitilde{} meV suggesting that significant antiferromagnetic exchange couplings persist well into the overdoped part of the cuprate phase diagram.",

author = "OJ Lipscombe and SM Hayden and B Vignolle and DF McMorrow and TG Perring",

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T1 - Persistence of High-Frequency Spin Fluctuations in Overdoped Superconducting La2-xSrxCuO4 (x=0.22)

AU - Lipscombe, OJ

AU - Hayden, SM

AU - Vignolle, B

AU - McMorrow, DF

AU - Perring, TG

N1 - Publisher: American Physical Society

PY - 2007/8

Y1 - 2007/8

N2 - 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.

AB - 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.

U2 - 10.1103/PhysRevLett.99.067002

DO - 10.1103/PhysRevLett.99.067002

M3 - Article (Academic Journal)

C2 - 17930856

SN - 1079-7114

VL - 99 (6, 067002)

SP - 1

EP - 4

JO - Physical Review Letters

JF - Physical Review Letters

ER -