Superconductivity in electron-doped PbBi2Te4
Xianghan Xu, Danrui Ni, Weiwei Xie, R. J. Cava
DOI 10.1103/PhysRevB.108.054525 · Physical Review B
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Abstract
Single crystals of In-doped PbBi2Te4 are synthesized via a conventional solid-state method. Chemical analysis and Hall measurements indicate that In replaces Pb, introducing n-type carriers, creating Pb1−xInxBi2Te4. A superconducting transition is observed with a maximum transition temperature around 2.06 K for Pb1−xInxBi2Te4. 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. Our findings establish an ambient-pressure superconducting system in the AM2X4 family, and doped PbBi2Te4 as a promising platform for the study of topological superconductivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Pb1-xInxBi2Te4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.06 | Pressure not reported | midpoint |
| Pb0.6In0.4Bi2Te4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.31 | Pressure not reported | midpoint |
| Pb0.5In0.5Bi2Te4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.53 | Pressure not reported | midpoint |
| Pb0.4In0.6Bi2Te4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.91 | Pressure not reported | midpoint |
| Pb0.3In0.7Bi2Te4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.06 | Pressure not reported | midpoint |
| SnBi2Te4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.85 | Pressure not reported | unknown |
| Pb0.2In0.8Te Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.8 | Pressure not reported | unknown |
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