The Superconductivity in Bi-Doped BaFe 2 As 2 Single Crystals

We have successfully synthesized a series of Bi-doped BaFe As high-quality single crystals for the first time. X-ray diffraction (XRD) patterns show an expansion of lattice parameter with Bi doping, indicating a negative pressure effect. By investigating the resistivity, a Fermi liquid (FL) to non-F...

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Bibliographic Details
Published in:Materials 2024-02, Vol.17 (4)
Main Authors: Si, Jiabin, Zhao, Jianfa, Liu, Ying, Jin, Changqing, Liu, Jibing, Xing, Lingyi
Format: Article
Language:English
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Summary:We have successfully synthesized a series of Bi-doped BaFe As high-quality single crystals for the first time. X-ray diffraction (XRD) patterns show an expansion of lattice parameter with Bi doping, indicating a negative pressure effect. By investigating the resistivity, a Fermi liquid (FL) to non-Fermi liquid (NFL) crossover is observed from normal state to antiferromagnetic order state, accompanied by three superconducting transitions labeled as SC I, SC II and SC III, which are supposed to be induced by three superconducting realms with various Bi concentrations. Thus, we propose that the NFL behavior is closely related to the presence of superconductivity. The magnetic susceptibility measurements further speculate that the SC I and SC III phases should exhibit filamentary superconductivity while the SC II exhibits a possible bulk superconductivity of ~7 K.
ISSN:1996-1944
1996-1944