66 citations · 320 across the 17 of their papers we have counts for
17 papers
Phonon Echo from Multi-Level Systems and Many-Body Interactions in Low-Temperature Glasses
Di Zhou
At low temperatures, glasses exhibit distinctive properties compared to crystalline solids. A notable example is the phonon echo, a phenomenon that motivated the two-level-system (…
Floquet odd-parity collinear magnets
Tongshuai Zhu, Di Zhou, Huaiqiang Wang +2
Altermagnets (AMs), recently discovered unconventional magnets distinct from both ferro- and antiferromagnets, have rapidly emerged as a prominent research topic in condensed matte…
Topological Boundary Modes in Nonlinear Dynamics with Chiral Symmetry
Di Zhou
Particle-hole symmetry and chiral symmetry play a pivotal role in multiple areas of physics, yet they remain unstudied in systems with nonlinear interactions whose nonlinear normal…
Observation of fourfold Dirac nodal line semimetal and its unconventional surface responses in sonic crystals
Chang-Yin Ji, Xiao-Ping Li, Zheng Tang +5
Three-dimensional nodal line semimetals (NLSMs) provide remarkable importance for both enrich topological physics and wave management. However, NLSMs realized in acoustic systems a…
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…
Topological Invariant and Anomalous Edge Modes of Strongly Nonlinear Systems
Di Zhou, D. Zeb Rocklin, Michael Leamy +1
Despite the extensive studies of topological states, their characterization in strongly nonlinear classical systems has been lacking. In this work, we identify the proper definitio…
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…
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…
Real Space Renormalization: A Generic Microscopic Theory for Low-Temperature Avalanches in Static Strained Insulating Glass
Di Zhou
We propose a microscopic model to study the avalanche problem of insulating glass deformed by external static uniform strain below K. We use three-dimensional real-space reno…
Anomalous Sound Velocity and Dielectric Shift in Glass: a Renormalization Technique for Mechanical and Dielectric Susceptibilities from Generic Coupled Block Model
Di Zhou
Glass sound velocity shift was observed to be longarithmically temperature dependent in both relaxation and resonance regimes: . It does not monotonically in…
Random Nonlinear Infinite-Level-System Model for Amorphous Solid Phonon Echo and Saturation Phenomena
Di Zhou, Anthony J. Leggett
The first two successful predictions for amorphous solid experiments by tunneling-two-level-system (TTLS) was phonon echo and saturation phenomena. In this paper by generalizing TT…
A Generic Microscopic Theory for the Universality of TTLS Model Meissner-Berret Ratio in Low-Temperature Glasses
Di Zhou, Anthony J. Leggett
Tunneling-two-level-system (TTLS) model has successfully explained several low-temperature glass universal properties which do not exist in their crystalline counterparts. The coup…