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Temperature dependence of the pseudogap in Y1−zPrzBa2Cu3O7−δ single crystals

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Abstract

We investigate the conductivity in the basis plane of Y1−zPrzBa2Cu3O7−δ and YBa2Cu3O7−δ single crystals. The excess conductivity, Δσ, is described by Δσ ~ (1 − T/T*)exp(Δab*/T) in a wide temperature range Tf < T < T*, where T* is the mean field temperature of the superconducting transition. We determine that the temperature dependence of the pseudogap (PG) is described in terms of the BCS-BEC crossover theoretical model. It is observed that a reduction in the praseodymium content results to the widening of the temperature interval that the PG region is realized and a narrowing of the area of existence of the linear dependence of the resistivity, ρ(T), in the ab plane.

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Authors and Affiliations

  1. Kharkov National University, 4 Svoboda Sq., 61077, Kharkov, Ukraine

    R. V. Vovk, Z. F. Nazyrov & I. L. Goulatis

  2. Department of Materials, Imperial College, London, SW7 2AZ, UK

    A. Chroneos

Authors
  1. R. V. Vovk
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  2. Z. F. Nazyrov
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  3. I. L. Goulatis
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  4. A. Chroneos
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Correspondence to A. Chroneos.

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Vovk, R.V., Nazyrov, Z.F., Goulatis, I.L. et al. Temperature dependence of the pseudogap in Y1−zPrzBa2Cu3O7−δ single crystals. J Mater Sci: Mater Electron 24, 1146–1149 (2013). https://doi.org/10.1007/s10854-012-0897-0

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  • DOI: https://doi.org/10.1007/s10854-012-0897-0

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