6 papers
Topological Floppy Modes in Epithelial Tissues
Harry Liu, Di Zhou, Leyou Zhang +2
Recent advances in topological mechanics have revealed unusual phenomena such as topologically protected floppy modes and states of self-stress that are exponentially localized at…
Non-Hermitian Topological Metamaterials with Odd Elasticity
Di Zhou, Junyi Zhang
We establish non-Hermitian topological mechanics in one dimensional (1D) and two dimensional (2D) lattices consisting of mass points connected by meta-beams that lead to odd elasti…
Switchable phonon diodes using nonlinear topological Maxwell lattices
Di Zhou, Jihong Ma, Kai Sun +2
Recent progress in topological mechanics have revealed a family of Maxwell lattices that exhibit topologically protected floppy edge modes. These modes lead to a strongly asymmetri…
Physical limits to sensing material properties
Farzan Beroz, Di Zhou, Xiaoming Mao +1
Constitutive relations describe how materials respond to external stimuli such as forces. All materials respond heterogeneously at small scales, which limits what a localized senso…
Topological mechanics in quasicrystals
Di Zhou, Leyou Zhang, Xiaoming Mao
We study topological mechanics in two-dimensional quasicrystalline parallelogram tilings. Topological mechanics has been studied intensively in periodic lattices in the past a few…
Edge Modes and Asymmetric Wave Transport in Topological Lattices: Experimental Characterization at Finite Frequencies
Jihong Ma, Di Zhou, Kai Sun +2
Although topological mechanical metamaterials have been extensively studied from a theoretical perspective, their experimental characterization has been lagging. To address this sh…