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Coexistence of the spin-density wave and superconductivity in Ba 1−x K x Fe 2 As 2

Europhysics Letters (EPL) · 2009 · Vol. 85(1) · pp. 17006–17006

H. Chen✉(Hefei National Center for Physical Sciences at Nanoscale)Yang Ren(Argonne National Laboratory)Yunfeng Qiu(NIST Center for Neutron Research)Wei Bao(Los Alamos National Laboratory)Ronghua Liu(University of Science and Technology of China)Gang Wu(Hefei National Center for Physical Sciences at Nanoscale)Tao Wu(Hefei National Center for Physical Sciences at Nanoscale)Yi Xie(Hefei National Center for Physical Sciences at Nanoscale)Xiangfeng Wang(University of Science and Technology of China)Q. Huang(National Institute of Standards and Technology)X. H. Chen(University of Science and Technology of China)

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Abstract

The relation between the spin-density-wave (SDW) and superconducting order is a central topic in current research on the FeAs-based high Tc superconductors. Conflicting results exist in the LaFeAs(O,F)-class of materials, for which whether the SDW and superconductivity are mutually exclusive or they can coexist has not been settled. Here we show that for the (Ba,K)Fe2As2 system, the SDW and superconductivity can coexist in an extended range of compositions. The availability of single crystalline samples and high value of the energy gaps would make the materials a model system to investigate the high Tc ferropnictide superconductivity.

Iron-based superconductors research Corporate Taxation and AvoidanceSuperconductivityCondensed matter physicsSpin density wavePhysicsSpin (aerodynamics)Order (exchange)Materials scienceThermodynamics

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