arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2011.09760cond-mat.mes-hallcond-mat.supr-con
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莫尔拓扑超导

Moiré-enabled topological superconductivity

Shawulienu Kezilebieke, Viliam Vaňo, Md N. Huda, Markus Aapro, Somesh Chandra Ganguli, Peter Liljeroth, Jose L. Lado

摘要:

对人工拓扑超导性的研究受到其出现所需的严格条件的限制。正如最近在扭曲的范德华材料中发现的各种相关电子态所证明的那样,莫尔图案可以作为一个强大的旋钮来创建人工电子结构。在这里,我们证明了范德瓦尔斯超导体和单层铁磁体之间的莫尔图案产生了周期性的电势调制,使得能够实现在没有莫尔图案的情况下无法访问的拓扑超导状态。磁云纹图案产生Yu-Shiba-Rusinov微带和我们使用低温扫描隧道显微镜(STM)和光谱(STS)检测到的Majorana边缘模式的周期性调制。莫尔条纹,更广泛地说,周期性的潜在调制是强大的工具,以克服传统的限制,实现和控制拓扑超导性。

英文摘要:

The search for artificial topological superconductivity has been limited by the stringent conditions required for its emergence. As exemplified by the recent discoveries of various correlated electronic states in twisted van der Waals materials, moiré patterns can act as a powerful knob to create artificial electronic structures. Here, we demonstrate that a moiré pattern between a van der Waals superconductor and a monolayer ferromagnet creates a periodic potential modulation that enables the realization of a topological superconducting state that would not be accessible in the absence of the moiré. The magnetic moiré pattern gives rise to Yu-Shiba-Rusinov minibands and periodic modulation of the Majorana edge modes that we detect using low-temperature scanning tunneling microscopy (STM) and spectroscopy (STS). Moiré patterns and, more broadly, periodic potential modulations are powerful tools to overcome the conventional constrains for realizing and controlling topological superconductivity.

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。

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