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      Correlated Electronic Structure of\({\mathrm{LaO}}_{1-x}{\mathrm{F}}_{x}\mathrm{FeAs}\)

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      Physical Review Letters
      American Physical Society (APS)

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          Generalized Gradient Approximation Made Simple

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            Iron-based layered superconductor La[O(1-x)F(x)]FeAs (x = 0.05-0.12) with T(c) = 26 K.

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              Superconductivity in two-dimensional CoO2 layers.

              Since the discovery of high-transition-temperature (high-T(c)) superconductivity in layered copper oxides, many researchers have searched for similar behaviour in other layered metal oxides involving 3d-transition metals, such as cobalt and nickel. Such attempts have so far failed, with the result that the copper oxide layer is thought to be essential for superconductivity. Here we report that Na(x)CoO2*yH2O (x approximately 0.35, y approximately 1.3) is a superconductor with a T(c) of about 5 K. This compound consists of two-dimensional CoO2 layers separated by a thick insulating layer of Na+ ions and H2O molecules. There is a marked resemblance in superconducting properties between the present material and high-T(c) copper oxides, suggesting that the two systems have similar underlying physics.
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                Author and article information

                Journal
                PRLTAO
                Physical Review Letters
                Phys. Rev. Lett.
                American Physical Society (APS)
                0031-9007
                1079-7114
                June 2008
                June 2 2008
                : 100
                : 22
                Article
                10.1103/PhysRevLett.100.226402
                f77fec6a-dbc5-4c8e-8b41-87700554c178
                © 2008

                http://link.aps.org/licenses/aps-default-license

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