Particulate Generation on Surface of Iron Selenide Films by Air Exposure
Particulate Generation on Surface of Iron Selenide Films by Air Exposure
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DOI：
10.1007/s10948-019-5020-9
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发表时间：
2019-01
影响因子：
1.8
通讯作者：
H. Hiramatsu;Kota Hanzawa;T. Kamiya;H. Hosono
中科院分区：
文献类型：
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作者：
H. Hiramatsu;Kota Hanzawa;T. Kamiya;H. Hosono
FeSe外延薄膜在暴露于空气后直接在其表面形成纳米级的特殊结构，这是因为这些结构阻碍了使用FeSe沟道层的电双层晶体管的场致超导电性，因此本文对这种现象进行了研究。用场效应扫描俄歇电子能谱进行的化学分析表明，特殊结构和其他平坦表面区域的化学成分没有明显差异。这种观察将微粒形成的可能来源限制在空气中的轻元素，如O、C、H和N。
Nanometer-sized particular structures are generated on the surfaces of FeSe epitaxial films directly after exposure to air; this phenomenon was studied in the current work because these structures are an obstacle to field-induced superconductivity in electric double-layer transistors using FeSe channel layers. Chemical analyses using field-effect scanning Auger electron spectroscopy revealed no clear difference in the chemical composition between the particular structures and the other flat surface region. This observation limits the possible origins of the particulate formation to light elements in air such as O, C, H, and N.