Quantifying the local mechanical properties of twisted double bilayer graphene
arXiv:2405.12610 · doi:10.1039/D3NR00388D
Abstract
Nanomechanical measurements of minimally twisted van der Waals materials remained elusive despite their fundamental importance for device realisation. Here, we use Ultrasonic Force Microscopy (UFM) to locally quantify the variation of out-of-plane Young's modulus in minimally twisted double bilayer graphene (TDBG). We reveal a softening of the Young's modulus by 7\% and 17\% along single and double domain walls, respectively. Our experimental results are confirmed by force-field relaxation models. This study highlights the strong tunability of nanomechanical properties in engineered twisted materials, and paves the way for future applications of designer 2D nanomechanical systems.
References in corpus (16)
- Moire bands in twisted double-layer graphene
- Tuning superconductivity in twisted bilayer graphene
- Emergent ferromagnetism near three-quarters filling in twisted bilayer graphene
- Graphene bilayer with a twist: electronic structure
- Optimized Tersoff and Brenner empirical potential parameters for lattice dynamics and phonon thermal transport in carbon nanotubes and graphene
- Commensurate-incommensurate transition for graphene on hexagonal boron nitride
- Atomic and electronic reconstruction at van der Waals interface in twisted bilayer graphene
- Electric Field Tunable Correlated States and Magnetic Phase Transitions in Twisted Bilayer-Bilayer Graphene
- Spin-polarized Correlated Insulator and Superconductor in Twisted Double Bilayer Graphene
- Strain Solitons and Topological Defects in Bilayer Graphene
- Tunable Moiré Bands and Strong Correlations in Small-Twist-Angle Bilayer Graphene
- Electrically tunable correlated and topological states in twisted monolayer-bilayer graphene
- Strain fields in twisted bilayer graphene
- Moiré metrology of energy landscapes in van der Waals heterostructures
- Networks of ABA and ABC stacked graphene on mica observed by scanning tunneling microscopy
- Unraveling intrinsic flexoelectricity in twisted double bilayer graphene