Nonlinear Actuation of Casimir Oscillators toward Chaos: Comparison of Topological Insulators and Metals

In the current study, we explore sensitivity of actuation dynamics electromechanical systems on novel materials, e.g., Bi2Se3, which is a well-known 3D Topological Insulator (TI), and compare their response to metallic conductors, Au, that are currently used in devices. Bifurcation phase portraits analysis conservative suggest strong difference between conduction states Bi2Se3 Au yields sufficiently weaker Casimir force enhance stable operation. Furthermore, for nonconservative driven systems, Melnikov function Poincare portrait probed occurrence chaotic behavior leading increased risk stiction. It was found presence TI enhanced operation against over significantly wider range conditions comparison typical conductors. Therefore, use TIs can allow sufficient surface conductance apply electrostatic compensation residual contact potentials and, at same time, yield weak forces favoring long-term behavior.