La2-xSrxCu1-yZnyO4: Tc and ns/m* correlations seen with muon spin rotation |
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Authors: | B Nachumi A Keren K Kojima M Larkin GM Luke J Merrin O Tchernyshöv WD Wu YJ Uemura Y Fukuzumi K Mizuhashi K Takenaka S Uchida |
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Institution: | (1) Department of Physics, Columbia University, 538 W. 120th St., New York, NY 10027, USA;(2) Department of Superconductivity, University of Tokyo, Bunkyo‐ku, Tokyo 113, Japan |
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Abstract: | We report the muon spin rotation experiments on Zn substituted La1-x Srx CuO4, for four zinc concentrations y=0.0,0.0025,0.005,0.01, at strontium concentrations x=0.15,0.20. We find that T_ c in the
optimally doped (x=0.15) and overdoped (x=0.20) 2:1:4 decreases linearly with increasing zinc concentration. Plotted against
the planar zinc concentration, the Tc’s of both series seem to fall on the same line. The superconducting carrier density/effective mass ratio, n_ s/m*, at first decreases linearly, rising above this line for higher zinc concentrations. This behavior may result from the localization
of carriers in an area \xiab around each zinc atom.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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