Interlayer rotation (twisting) switches interlayer mobility in moiré superlattices.

Interlayer rotation in bilayer MoS2 nanoflakes causes a tenfold increase in interfacial mobility by altering atomic structures at the buried interface.

• Why it matters: Understanding how atomic arrangements influence interface mobility is crucial for designing materials with tailored mechanical and electronic properties, yet direct observations have been limited.
• What they did: The study used atomically resolved transmission electron microscopy to observe real-time twisting and sliding dynamics in bilayer MoS2, linking structural transitions to mobility changes.
• The result: Findings reveal that incommensurate, twisted interfaces are significantly more mobile and exhibit desynchronized atomic motions, enabling precise control of interfacial properties through interlayer rotation.