6 papers · 1 filter
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…
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…
Topological edge floppy modes in disordered fiber networks
Di Zhou, Leyou Zhang, Xiaoming Mao
Disordered fiber networks are ubiquitous in a broad range of natural (e.g., cytoskeleton) and manmade (e.g., aerogels) materials. In this paper, we discuss the emergence of topolog…
A Microscopic Field Theory for the Universal Shift of Sound Velocity and Dielectric Constant in Low-Temperature Glasses
Di Zhou
In low-temperature glasses, the sound velocity changes as the logarithmic function of temperature below K: . With increasing tem…