The Persistence of High-Frequency Spin Fluctuations in Overdoped La$_{2-x}$Sr$_{x}$CuO$_{4}$ ($x$=0.22)

B. Vignolle; D.F. McMorrow; O.J. Lipscombe; S.M. Hayden; T.G. Perring

arxiv: 0706.4464 · v1 · submitted 2007-06-29 · ❄️ cond-mat.supr-con · cond-mat.str-el

The Persistence of High-Frequency Spin Fluctuations in Overdoped La_(2-x)Sr_(x)CuO₄ (x=0.22)

O.J. Lipscombe , S.M. Hayden , B. Vignolle , D.F. McMorrow , T.G. Perring This is my paper

classification ❄️ cond-mat.supr-con cond-mat.str-el

keywords overdopedresponsehigh-frequencymagneticpeakedstrongantiferromagneticcollective

0 comments

read the original 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 wavevectors for all energies investigated. We observe a strong high-frequency magnetic response for E >= 80 meV suggesting that significant antiferromagnetic exchange couplings persist well into the overdoped part of the cuprate phase diagram.

This paper has not been read by Pith yet.

The Persistence of High-Frequency Spin Fluctuations in Overdoped La_(2-x)Sr_(x)CuO₄ (x=0.22)

discussion (0)