论文标题
通过将拓扑绝缘子SNBI2TE4合金通过合金进行超导性。
Superconductivity by alloying the topological insulator SnBi2Te4
论文作者
论文摘要
将依赖性合金粘合到拓扑绝缘子SN1-XINXBI2TE4中，可诱导批量超导性，临界温度TC高达1.85 K，上临界场高达14个KOE。电阻率，热容量和磁化率测量得到了证实。热容量显示在TC处的不连续性，而TC下方的温度依赖性与弱耦合BCS理论一致，并提示在0.25 MeV附近的超导差距。超导性是II型，拓扑表面状态已通过光发射验证。一张简单的图片表明，与等值磁性拓扑拓扑器MNBI2TE4相比，其中天然异质结构在不同的sublattices上具有互补特性，并激发了对这种大型化合物系列的新兴趣。 SN1-Xinxbi2Te4中拓扑表面状态和超导性的存在将这些材料视为研究拓扑超导性的有前途的候选者。
Alloying indium into the topological insulator Sn1-xInxBi2Te4 induces bulk superconductivity with critical temperatures Tc up to 1.85 K and upper critical fields up to about 14 kOe. This is confirmed by electrical resistivity, heat capacity, and magnetic susceptibility measurements. The heat capacity shows a discontinuity at Tc and temperature dependence below Tc consistent with weak coupling BCS theory, and suggests a superconducting gap near 0.25 meV. The superconductivity is type-II and the topological surface states have been verified by photoemission. A simple picture suggests analogies with the isostructural magnetic topological insulator MnBi2Te4, in which a natural heterostructure hosts complementary properties on different sublattices, and motivates new interest in this large family of compounds. The existence of both topological surface states and superconductivity in Sn1-xInxBi2Te4 identifies these materials as promising candidates for the study of topological superconductivity.
