论文标题
单电子电荷转移到个人涡流中的假定Majorana和琐碎模式
Single-electron charge transfer into putative Majorana and trivial modes in individual vortices
论文作者
论文摘要
Majorana Bound State是固体中推定的集体激励，具有Majorana Fermions的自轭特性 - 它们是自己的反颗粒。在基于铁的超导体中，涡流中的零能量状态已报道为潜在的主要约束状态，但证据仍然存在争议。在这里，我们使用扫描隧道噪声光谱法研究了传统超导体NBSE2和推定的Majorana Platform Fete0.55Se0.45中的涡旋式结合状态的隧道过程。我们发现，在两种情况下，将隧穿到涡旋结合状态下都表现出单个电子电荷的电荷转移。我们在FETE0.55SE0.45中对零能量结合状态的数据排除了Yu-Shiba-Rusinov状态的可能性，并且与Majorana Bound Bound State和Trivial Vortex Bound State都一致。我们的结果为在涡旋核心和未来的Majorana设备中调查异国情调的州开辟了一条途径，尽管需要进一步的理论调查涉及电荷动态和超导技巧。
Majorana bound states are putative collective excitations in solids that exhibit the self-conjugate property of Majorana fermions - they are their own antiparticles. In iron-based superconductors, zero-energy states in vortices have been reported as potential Majorana bound states, but the evidence remains controversial. Here, we use scanning tunneling noise spectroscopy to study the tunneling process into vortex bound states in the conventional superconductor NbSe2, and in the putative Majorana platform FeTe0.55Se0.45. We find that tunneling into vortex bound states in both cases exhibits charge transfer of a single electron charge. Our data for the zero-energy bound states in FeTe0.55Se0.45 exclude the possibility of Yu-Shiba-Rusinov states and are consistent with both Majorana bound states and trivial vortex bound states. Our results open an avenue for investigating the exotic states in vortex cores and for future Majorana devices, although further theoretical investigations involving charge dynamics and superconducting tips are necessary.
