Direct relation between the low-energy spin excitations and superconductivity of overdoped high-Tc superconductors

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DOIResolve DOI: http://doi.org/10.1103/PhysRevLett.92.217004
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TypeArticle
Journal titlePhysical Review Letters
Phys. Rev. Lett
ISSN0031-9007
Volume92
Issue21
Pages217004–; # of pages: 4
AbstractThe dynamic spin susceptibility, chi(")(omega), has been measured over the energy range of 2</=omega</=10 meV for overdoped La2-xSrxCuO4. Incommensurate (IC) spin excitations are observed at 8 K for all superconducting samples for 0.25</=x</=0.28 with chi(") peaking at approximately 6 meV. The IC peaks at 6 meV become smaller in intensity with increasing x and, finally, become unobservable for a sample with x=0.30 which has no bulk superconductivity. The maximum chi(") decreases linearly with T(c)(onset) in the overdoped region, implying a direct cooperative relation between the spin fluctuations and the superconductivity.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Canadian Neutron Beam Centre
Peer reviewedNo
Identifier10109961
NPARC number12328971
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Record identifier8fcb3924-484d-4be9-b2e6-6f6f3496acfa
Record created2009-09-10
Record modified2016-05-09
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