Slip corona surrounding bilayer graphene nanopore

Area of Science:

• Materials Science
• Condensed Matter Physics
• Nanotechnology

Background:

• Electronic and magnetic properties of bilayer graphene (BLG) are sensitive to the stacking order of its layers.
• Nanopores in BLG can influence these properties by altering local stacking configurations.

Purpose of the Study:

• To introduce and characterize a novel
• slip corona
• a transition region in BLG near nanopores.
• To investigate the influence of nanopore size on the dimensions of this slip corona.

Main Methods:

• Atomistic simulations were employed to model the behavior of BLG near nanopores.
• A continuum model was developed and validated against simulation results.
• The study analyzed the transition from A-A stacking near bilayer edges (BLEs) to A-B stacking further away.

Main Results:

• A consistent description of the slip corona's shape and size (~50 nm diameter) was achieved for nanopores smaller than ~5 nm.
• The slip corona is significantly larger than the nanopore and typical dislocation core widths due to weak interlayer interactions.
• The continuum model predicts an increase in corona width with increasing nanopore diameter, converging to ~40 nm for diameters > ~80 nm.

Conclusions:

• The slip corona represents a substantial stacking transition region in BLG.
• This phenomenon provides a new mechanism for tuning the electronic and magnetic properties of bilayer graphene.
• Understanding and controlling the slip corona could lead to novel applications in materials engineering.