论文标题
未开发的MBE增长模式揭示了超导NBN的新特性
An unexplored MBE growth mode reveals new properties of superconducting NbN
论文作者
论文摘要
在晶体生长中获得未开发的条件通常会揭示出惊人的惊喜和新的身体行为制度。在这项工作中，在高于1000 $^\ circ $ c的技术上进行分子束外延，比过去高，比过去更高，在整个生长，原子能平稳的表面，正常的金属电阻率低为37 $ 37 $ -CM $ -CM的高度频率上，持续的金属电阻率很低。当NBN薄膜被冷却时，观察到了大厅系数的迹象，并且高材料质量允许该超导体中的Abrikosov Vortex晶格进行首次成像。
Accessing unexplored conditions in crystal growth often reveals remarkable surprises and new regimes of physical behavior. In this work, performing molecular beam epitaxy of the technologically important superconductor NbN at temperatures greater than 1000$^\circ$C, higher than in the past, is found to reveal persistent RHEED oscillations throughout the growth, atomically smooth surfaces, normal metal resistivities as low as 37$μΩ$-cm and superconducting critical temperatures in excess of 15 K. Most remarkably, a reversal of the sign of the Hall coefficient is observed as the NbN films are cooled, and the high material quality allows the first imaging of Abrikosov vortex lattices in this superconductor.
