Isotope Effect in the Superfluid Density of High-Temperature Superconducting Cuprates: Stripes, Pseudogap, and Impurities
J. L. TallonMacDiarmid Institute, Industrial Research Ltd., P.O. Box 31310, Lower Hutt, New ZealandR. S. IslamIRC in Superconductivity, Cambridge University, Cambridge CB3 0HE, United KingdomJames StoreySchool of Chemical and Physical Sciences, Victoria University, Wellington, New ZealandG. V. M. WilliamsMacDiarmid Institute, Industrial Research Ltd., P.O. Box 31310, Lower Hutt, New ZealandJ. R. CooperIRC in Superconductivity, Cambridge University, Cambridge CB3 0HE, United Kingdom
2005en
ABI
Annotatsiya
Underdoped cuprates exhibit a normal-state pseudogap, and their spins and doped carriers tend to spatially separate into 1D or 2D stripes. Some view these as central to superconductivity and others as peripheral and merely competing. Using La(2-x)Sr(x)Cu(1-y)Zn(y)O4 we show that an oxygen isotope effect in Tc and in the superfluid density can be used to distinguish between the roles of stripes and pseudogap and also to detect the presence of impurity scattering. We conclude that stripes and pseudogap are distinct, and both compete and coexist with superconductivity.
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