Quasiparticle density of states measurements in clean superconducting AlMn alloys
Quasiparticle density of states measurements in clean superconducting AlMn alloys
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清洁超导 AlMn 合金中的准粒子态密度测量
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
J. Ullom
中科院分区：
文献类型：
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作者：
G. O’Neil;D. Schmidt;N. Tomlin;J. Ullom
掺杂有锰的铝（AlMn）形成超导合金，其转变温度被添加的锰抑制。我们提出了准粒子态密度（DOS）测量超导AlMn合金的电流-电压测量正常金属/绝缘体/超导体隧道结。DOS仍然是Bardeen-Cooper-Schriller式的，差距缩小，与Kaiser的预测相匹配。然而，我们测量了Kaiser没有预测到的额外的子能隙状态，并证明了这些子能隙状态将损害一些潜在的应用。
Aluminum doped with Manganese (AlMn) forms a superconducting alloy with the transition temperature suppressed by the added manganese. We present quasiparticle density of states (DOS) measurements on superconducting AlMn alloys made by current-voltage measurements on normal-metal/insulator/superconductor tunnel junctions. The DOS remains Bardeen-Cooper-Schrieffer-like with a reduced gap, matching the predictions of Kaiser. However, we measure additional subgap states not predicted by Kaiser, and demonstrate that these subgap states will harm some potential applications.