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arXiv · 0811.4534

Pseudogap state in slightly doped by aluminium and praseodymium YBa$_2$Cu$_3$O$_{7-δ}$ single crystals with a given topology of plane defects

R. V. Vovk·M. A. Obolenskii·A. A. Zavgorodniy·D. A. Lotnyk·K. A. Kotvitskaya
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Abstract

In present work the conductivity in the basis plane of YBaCuO single crystals slightly doped by Al and Pr with a pre-specified topology of twin boundaries has been investigated. The excess conductivity for the analyzed samples shows dependence like $Δσ\sim(1-T/T^*)\exp(Δ_{ab}^*/T)$ in wide temperature range $T_f<T<T^*$, where $T^*$ can be represents as mean field temperature of superconducting transition. The temperature dependence of pseudogap can be satisfactory described in terms of the BCS-BEC crossover theoretical model.

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R. V. Vovk, M. A. Obolenskii, A. A. Zavgorodniy, D. A. Lotnyk, K. A. Kotvitskaya. 2008-12-08. Pseudogap state in slightly doped by aluminium and praseodymium YBa$_2$Cu$_3$O$_{7-δ}$ single crystals with a given topology of plane defects. https://doi.org/10.1016/j.physb.2009.05.047

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