论文标题
无定形雷克斯（x〜6）薄膜的超导性
Superconductivity in amorphous RexZr (x ~ 6) thin films
论文作者
论文摘要
我们以薄膜形式报告了新的无定形超导体Rexzr（X〜6）的生长，表征和超导特性。膜是通过脉冲激光沉积生长的，底物保持在室温下。厚度大于40 nm的膜显示出5.9 K的超导过渡温度（TC）。测量了从120到3 nm的厚度变化的膜的超导特性。正常状态电阻以厚度倒数线性缩放。过渡温度，临界场，相干长度，穿透深度和超导能量间隙略有变化，而膜厚度降低至8 nm。扫描隧道光谱和穿透深度测量值为单个间隙强耦合S波超导体提供了证据。磁通型特性表明具有丰富的磁场 - 温度相图，其可能存在涡流液相的可能性，这是在混合状态的很大一部分上存在的。
We report the growth, characterization and superconducting properties of a new amorphous superconductor, RexZr ( x ~ 6 ), in thin film form. Films were grown by pulsed laser deposition with the substrate kept at room temperature. Films with thickness larger than 40 nm showed a superconducting transition temperature (Tc) of 5.9 K. Superconducting properties were measured for films with varying thickness from 120 to 3 nm. The normal state resistance scales linearly with inverse of thickness. The transition temperature, critical field, coherence length, penetration depth and superconducting energy gap changes marginally with decreasing film thickness down to 8 nm. Scanning tunneling spectroscopy and penetration depth measurements provide evidence for a single gap strong coupling s-wave superconductor. Magneto-transport properties indicate a rich magnetic field-temperature phase diagram with the possibility of vortex liquid phases existing over a large fraction of the mixed state.
