Phys. Rev. B 61, 627–633 (2000)Zn-doping effect on the c-axis charge dynamics of underdoped high-Tc cupratesReceived 16 April 1999; published in the issue dated 1 January 2000 The c-axis resistivity and infrared spectrum are investigated for Zn-doped YBa2Cu3O7-y and La2-xSrxCuO4 in the underdoped regime. We find that the normal-state pseudogap in the c-axis optical conductivity is robust in the presence of Zn impurities and that the pseudogap and the divergent c-axis resistivity persist even when Tc is suppressed near zero by Zn doping. In the superconducting state a rapid decrease in the c-axis Josephson plasma frequency is observed, but the plasma edge remains sharp reflecting the robustness of the low-energy gap feature against Zn doping. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.61.627
DOI:
10.1103/PhysRevB.61.627
PACS:
74.25.Gz, 74.25.Fy, 74.72.Bk, 74.72.Dn
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