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High temperature superconductivity in iron-oxypnictides |
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Prof. X.H. Chen University of Science and Technology of China |
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We will report the discovery of superconductivity in SmFeAsO1-xFx with Tc higher than 40 K in Fe-based superconductors,
and give a brief review on the properties of the material.
We show the transport properties (resistivity, Hall coefficient, TEP) in the normal state.
The results suggest a quantum phase transition around x=0.14 in SmFeAsO1-xFx system. An electronic phase diagram is proposed.
In addition, the anisotropy in resistivity and susceptibility is also discussed in single crystals BaFe2As2 and CaFe2As2.
The phase diagrams of Ba1-xKxFe2As2 and BaFe2-xCoxAs2 system and isotope effect are also discussed.
- H.X. Chen et al, Nature 453, 761 (2008).
- T. Y. Chen et al, Nature 453, 1224 (2008).
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