Zn-induced spin dynamics in overdoped La2−xSrxCu1−yZnyO4

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DOIResolve DOI: http://doi.org/10.1103/PhysRevB.85.014507
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TypeArticle
Journal titlePhysical Review B
Volume85
Issue1
Pages014507-1014507-9
AbstractSpin fluctuations and the local spin susceptibility in isovalently Zn-substituted La2−xSrxCu1−yZnyO4 (x=0.25, y≈0.01) are measured via inelastic neutron-scattering techniques. As Zn2+ is substituted onto the Cu2+-sites, an anomalous enhancement of the local spin susceptibility χ′′(ω) appears due to the emergence of a commensurate antiferromagnetic excitation centered at wave vector Q =(π,π,0) that coexists with the known incommensurate spin-density wave excitations at QHK=(π±δ,π),(π,π±δ). Our results support a picture of Zn-induced antiferromagnetic (AF) fluctuations appearing through a local staggered polarization of Cu2+ spins, and the simultaneous suppression of Tc as AF fluctuations are slowed in proximity to Zn impurities suggests the continued importance of high-energy AF fluctuations at the far overdoped edge of superconductivity in the cuprates.
Publication date
LanguageEnglish
AffiliationNRC Canadian Neutron Beam Centre; National Research Council Canada
Peer reviewedYes
NPARC number20140153
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Record identifier3554b1db-e7a9-43b0-96e3-866e294db01f
Record created2012-06-14
Record modified2016-05-09
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