洁净Nb（111）表面的制备及STM研究
Preparation and STM study of clean Nb(111) surfaces
摘要：
铌在所有元素超导体中具有最高的转变温度，已成为实现良好定义的低维磁体-超导体混合系统的有利衬底，该混合系统表现出新颖类型的奇异电子态，如Majorana零能模式。虽然先前已经报道了用于获得原子级清洁的Nb（110）衬底的制备过程，但是仍然缺乏用于清洁的Nb（111）表面的合适的制备方法。在这里，我们报告了一种基于原子氢处理的Nb（111）表面清洁配方，然后进行短暂的高温闪光。通过高分辨率扫描隧道显微镜（STM）研究了清洁的非重构Nb（111）的原子表面结构，以及与由在高退火温度下的表面预熔化产生的bcc晶体的（111）平面相比具有降低的原子密度的表面重构。
英文摘要：
Niobium with its highest transition temperature among all elemental superconductors has become a favorable substrate for realizing well-defined low-dimensional magnet-superconductor hybrid systems exhibiting novel types of exotic electronic states such as Majorana zero-energy modes. While a preparation procedure for obtaining atomically clean Nb(110) substrates has previously been reported, a suitable preparation method for clean Nb(111) surfaces is still lacking. Here, we report a recipe for cleaning Nb(111) surfaces based on an atomic hydrogen treatment followed by short flashes to elevated temperatures. The atomic surface structure of clean non-reconstructed Nb(111) is investigated by high-resolution scanning tunneling microscopy (STM), as well as a surface reconstruction with a reduced atom density compared to the (111) plane of a bcc crystal resulting from a surface premelting at high annealing temperatures.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
