Topological Transition in Spiral Elastic Valley Metamaterials
Shuaifeng Li, Jinkyu Yang
Abstract
Elastic valley metamaterials offer an excellent platform to manipulate elastic waves and have potential applications in energy harvesting and elastography. Here we introduce a series of strategies to realize a topological transition in spiral elastic valley metamaterials by parameter modulations. We show the evolution of the Berry curvature and valley Chern number as a function of inherent parameters of a spiral, which further results in a general scheme to achieve topological valley edge states. Our strategy leverages multiple degrees of freedom in spiral elastic valley metamaterials to provide enhanced opportunities for desired topological states.
Topics & Concepts
MetamaterialPhysicsTopology (electrical circuits)CurvatureSpiral (railway)Berry connection and curvatureFunction (biology)Elastic energyEnhanced Data Rates for GSM EvolutionDegrees of freedom (physics and chemistry)Classical mechanicsHourglassChern classGeometryEnergy (signal processing)Scheme (mathematics)Transformation opticsNetwork topologySeries (stratigraphy)Theoretical physicsGeometric phaseElasticity (physics)Acoustic Wave Phenomena ResearchTopological Materials and PhenomenaNonlocal and gradient elasticity in micro/nano structures