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- W156989163 abstract "High magnetic field studies of cuprate superconductors revealed a non-BCS temperature dependence of the upper critical field $H_{c2}(T)$ determined resistively by several groups. These determinations caused some doubts on the grounds of both the contrasting effect of the magnetic field on the in-plane and out-of-plane resistances reported for large Bi2212 sample and the large Nernst signal emph{well above} $T_{c}$. Here we present both $rho_{ab}(B)$ and $rho_{c}(B)$ of tiny Bi2212 crystals in magnetic fields up to 50 Tesla. None of our measurements revealed a situation when on the field increase $rho_c$ reaches its maximum while $rho_{ab}$ remains very small if not zero. The resistive %upper critical fields estimated from the in-plane and out-of-plane $H_{c2}(T)$ estimated from $rho_{ab}(B)$ and $rho_{c}(B)$ are approximately the same. Our results support any theory of cuprates that describes the state above the resistive phase transition as perfectly normal with a zero off-diagonal order parameter. In particular, the anomalous Nernst effect above the resistive phase transition in high-$T_{c}$ cuprates can be described quantitatively as a normal state phenomenon in a model with itinerant and localised fermions and/or charged bosons." @default.
- W156989163 created "2016-06-24" @default.
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- W156989163 date "2004-10-04" @default.
- W156989163 modified "2023-09-26" @default.
- W156989163 title "The normal state of superconducting cuprates might really be normal after all" @default.
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- W156989163 doi "https://doi.org/10.48550/arxiv.cond-mat/0410075" @default.
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