Molecular-Scale Memory Generated by Liquid-Like Spins in On-Surface Synthesized Nanoclusters

Area of Science:

• Materials Science
• Condensed Matter Physics
• Nanotechnology

Background:

• Understanding how materials form memory is crucial across scientific disciplines.
• Molecular spins and their dynamics are key to exploring novel memory mechanisms.

Purpose of the Study:

• Investigate memory function and slow dynamics in amino-ferrocene nanoclusters.
• Explore the role of liquid-like molecular spins in equilibrium and nonequilibrium states.

Main Methods:

• Utilized amino-ferrocene nanoclusters (approx. 2 nm diameter).
• Exploited magnetic dipole interactions to form fluidly entangled spin structures at low temperatures.
• Investigated spin dynamics under zero or constant magnetic fields and after field removal.

Main Results:

• Demonstrated slow dynamics in nanoclusters behaving like a liquid in equilibrium.
• Created frozen entangled spin structures in a nonequilibrium state by removing the magnetic field.
• Showcased memory function through spin detachment/reattachment via a thermal activation barrier.

Conclusions:

• Developed a novel molecular memory mechanism based on spin entanglement dynamics.
• This memory function is independent of magnetic anisotropy, molecular structure, or charge changes.
• Highlights a new pathway for designing advanced molecular memory devices.