The pseudogap state is one of the peculiarities of the cuprate high-temperature superconductors. Here we investigate its presence in BaCo x Fe 2− x As 2 , a member of the pnictide family, with temperature-dependent scanning tunneling spectroscopy. We observe that for under, optimally and overdoped systems the gap in the tunneling spectra always closes at the bulk T c , ruling out the presence of a pseudogap state.
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