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Enhancement of Tc in BiS2 based superconductors NdO0.7F0.3BiS2 by substitution of Pb for Bi

We succeed in enhancement of a superconducting transition temperature (Tc) for NdO0.7F0.3BiS2 single crystal by partial substitution of Pb for Bi. The Tc increases with increasing Pb concentration until 6%. The maximum Tczero is 5.6 K, which is the highest value among BiS2 based superconductors synthesized under an ambient pressure. Pb substitution for Bi induces lattice shrinkage along the c axis. These results reflect that superconductivity in this system is responsive to the lattice strain.

preprint2015arXivOpen access
S. DemuraY. FujisawaS. OtsukiR. IshioY. TakanoH. Sakata
cond-mat.supr-con
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Open access6 authors1 topic
Imported metadata coverageMissing code, dataset, citation and institution fields are tracked without dominating the paper.Details
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S. DemuraY. FujisawaS. OtsukiR. IshioY. TakanoH. Sakata

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