Coexistence of the spin-density-wave and superconductivity in the (Ba,K)Fe2As2
H. Chen, Y. Ren, Y. Qiu, Wei Bao, R. H. Liu, G. Wu, T. Wu, Y. L. Xie,, X. F. Wang, Q. Huang, X. H. Chen
TL;DR
This paper demonstrates that in (Ba,K)Fe2As2, spin-density-wave and superconducting phases can coexist over a range of compositions, providing a valuable model for studying high-temperature superconductivity in ferropnictides.
Contribution
It establishes the coexistence of SDW and superconductivity in (Ba,K)Fe2As2, resolving previous conflicting results and highlighting its potential as a model system.
Findings
SDW and superconductivity coexist in (Ba,K)Fe2As2
Single crystals enable detailed coexistence studies
High energy gaps suggest strong superconducting pairing
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.
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