外延（111）取向金/钒异质结中的诱导超导电性和工程约瑟夫森隧穿器件
Induced superconductivity and engineered Josephson tunneling devices in epitaxial (111)-oriented gold/vanadium heterostructures
摘要：
我们报道了一种独特的实验方法，通过在具有强自旋轨道耦合的外延金属薄膜中诱导超导性来创建拓扑超导体。在超高真空条件下，利用分子束外延技术，在取向良好的钒（V）s波超导薄膜上生长出了（111）取向的单相金（Au）薄膜。我们获得了原子级光滑的金薄膜的厚度甚至下降到纳米以下，表现出接近理想的表面质量。生长态的V/Au双层异质结构在4K左右出现超导转变。在由外延双层膜制成的S-I-S隧道结中观察到了清晰的约瑟夫森隧穿和Andreev反射。势垒厚度相关的隧穿和相关的亚谐波能隙结构（SGS）证实了Au（111）中的感生超导性，为工程化基于薄膜异质结构的p波超导体和Majorana费米子纳米器件铺平了道路。
英文摘要：
We report a unique experimental approach to create topological superconductors by inducing superconductivity into epitaxial metallic thin film with strong spin-orbit coupling. Utilizing molecular beam epitaxy technique under ultra-high vacuum condition, we are able to achieve (111) oriented single phase of gold (Au) thin film grown on a well-oriented vanadium (V) s-wave superconductor film with clean interface. We obtained atomically smooth Au thin films with thicknesses even down to below a nanometer showing near-ideal surface quality. The as-grown V/Au bilayer heterostructure exhibits superconducting transition at around 4 K. Clear Josephson tunneling and Andreev reflection are observed in S-I-S tunnel junctions fabricated from the epitaxial bi-layers. The barrier thickness dependent tunneling and the associated subharmonic gap structures (SGS) confirmed the induced superconductivity in Au (111), paving the way for engineering thin film heterostructure based p-wave superconductors and nano devices for Majorana fermion.
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。
