Anisotropic superconductivity in the topological semimetal SrSn3 with layered Sn kagome network
Yang Yang, Jiayang Li, Majeed Ur Rehman, Wei Ning, Ning Hao, Xiangde Zhu, Mingliang Tian
DOI 10.1103/PhysRevB.111.184517 · Physical Review B
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Abstract
The bulk superconductivity of single-crystal SrSn3, a kagome metal featuring a two-dimensional tin kagome network in each layer, is investigated. SrSn3 single crystals, which crystallize in a centrosymmetric hexagonal structure, are synthesized and characterized. Superconducting properties are evaluated through resistivity, magnetic susceptibility, and specific heat measurements, confirming anisotropic type-II superconductivity with a critical temperature (Tc) of 5.5 K. The anomalous temperature dependence of Hc2, derived from electrical resistivity measurements, suggests the presence of two-gap superconductivity. Furthermore, specific heat analysis shows that a two-gap model provides a significantly better fit than a single-gap model. Band structure calculations reveal a topological state in SrSn3, indicating its potential as a platform for exploring the interplay between topology and superconductivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| SrSn3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.5 | Pressure not reported | midpoint |
| SrSn3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.5 | Pressure not reported | onset |
| SrSn3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.5 | Pressure not reported | unknown |
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