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Moire-Enabled Topological Superconductivity
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DOI：10.1021/acs.nanolett.1c03856.png)
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Abstract
En 中文
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, moire patterns can act as a powerful knob to create artificial electronic structures. Here, we demonstrate that a moire 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 moire. The magnetic moire 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). Moire patterns and, more broadly, periodic potential modulations are powerful tools to overcome the conventional constraints for realizing and controlling topological superconductivity.
Keywords:
scanning tunneling microscopy
topological superconductor
moire pattern
2D ferromagnet
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