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DOE OSTI · 2419517

Superconductivity in electron-doped PbBi 2 ⁢Te 4

Xu, Xianghan·Ni, Danrui·Xie, Weiwei·Cava, R. J.
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Abstract

Single crystals of In-doped PbBi 2 ⁢Te 4 are synthesized via a conventional solid-state method. Chemical analysis and Hall measurements indicate that In replaces Pb, introducing n-type carriers, creating Pb 1–x ⁢In x ⁢Bi 2 ⁢Te 4 . A superconducting transition is observed with a maximum transition temperature around 2.06 K for Pb 1–x⁢ In x ⁢Bi 2 ⁢Te 4 . Field-dependent transport measurements reveal type-II superconductivity and yield a maximum upper critical field around 1.55 T. Thermodynamic data indicates bulk superconductivity in the BCS weak-coupling limit. Finally, our findings establish an ambient-pressure superconducting system in the AM 2 ⁢X 4 family, and doped PbBi 2 ⁢Te 4 as a promising platform for the study of topological superconductivity.

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36 MATERIALS SCIENCE75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITYcrystal growthresistivity measurementssingle crystal materialssuperconductivitysuperconductorstopological superconductorstype-II superconductorsx-ray diffraction

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Xu, Xianghan, Ni, Danrui, Xie, Weiwei, Cava, R. J.. 2023-08-29. Superconductivity in electron-doped PbBi 2 ⁢Te 4. https://doi.org/10.1103/physrevb.108.054525

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36 MATERIALS SCIENCE↗