Mechanically-tunable bandgap closing in 2D graphene phononic crystals
arXiv:2206.11774 · doi:10.1038/s41699-023-00374-4
Abstract
We present a tunable phononic crystal which undergoes a phase transition from mechanically insulating to mechanically transmissive (metallic). Specifically, in our simulations for a phononic lattice under biaxial tension ( = 0.01 Nm), we find a bandgap for out-of-plane phonons in the range of 48.8 - 56.4 MHz, which we can close by increasing the degree of tension uniaxiality () to 1.7. To manipulate the tension distribution, we design a realistic device of finite size, where is tuned by applying a gate voltage to a phononic crystal made from suspended graphene. We show that the phase transition can be probed via acoustic transmission measurements and that the phononic bandgap persists even after the inclusion surface contaminants and random tension variations present in realistic devices. The proposed system acts as a transistor for phonons with an on/off ratio of (100 dB suppression) and is thus a valuable extension for phonon logic applications. In addition, this mechanical analogue to a metal-insulator transition (mMIT) allows tunable coupling between mechanical entities (e.g. mechanical qubits).
arXiv commentSI at the end of the document
References in corpus (26)
- The electronic properties of graphene
- Two-Dimensional Gas of Massless Dirac Fermions in Graphene
- Impermeable Atomic Membranes from Graphene Sheets
- Quantum state transfer and entanglement distribution among distant nodes in a quantum network
- Performance of Monolayer Graphene Nanomechanical Resonators with Electrical Readout
- Topologically protected elastic waves in phononic metamaterials
- Remote quantum entanglement between two micromechanical oscillators
- Propagating phonons coupled to an artificial atom
- Raman spectroscopy as probe of nanometer-scale strain variations in graphene
- Topological negative refraction of surface acoustic waves in a Weyl phononic crystal
- Ultra-coherent nanomechanical resonators via soft clamping and dissipation dilution
- The Effect of Intrinsic Crumpling on the Mechanics of Free-Standing Graphene
- Random strain fluctuations as dominant disorder source for high-quality on-substrate graphene devices
- Control of coherent information via on chip photonic-phononic emitter-receivers
- Nonlinear nano-electromechanical lattices for high-frequency, tunable stress propagation
- Entanglement between Distant Macroscopic Mechanical and Spin Systems
- Significant Reduction of Graphene Thermal Conductivity by Phononic Crystal Structure
- A phononic bandgap shield for high-Q membrane microresonators
- Topological Phononic Logic
- Strong indirect coupling between graphene-based mechanical resonators via a phonon cavity
- Hexagonal Boron Nitride Phononic Crystal Waveguides
- Tunable graphene phononic crystal
- Electrostatically induced phononic crystal
- On-chip distribution of quantum information using traveling phonons
- Neutral and charged excitons interplay in non-uniformly strain-engineered WS
- Temperature Dependent Non-linear Damping in Palladium Nano-mechanical Resonators