101 citations · 670 across the 33 of their papers we have counts for
34 papers
Giant Flat Band Amplification via Inertial Anchors
Wentao Mao, Stefano Gonella
In electronic materials, flat bands are associated with compact electron localization, with implications for superconductivity, ferromagnetism and strongly correlated systems. The…
Lattice Materials with Topological States Optimized On-Demand
Pegah Azizi, Rahul Dev Kundu, Weichen Li +3
Topological states of matter, first discovered in quantum systems, have opened new avenues for wave manipulation beyond the quantum realm. In elastic media, realizing these topolog…
Non-local twist sequences in floppy kagome chains
Pegah Azizi, Stefano Gonella
The twisted kagome family comprises a spectrum of configurations that can be realized through the sweep of a single configurational degree of freedom known as a twist angle. Recent…
Edge-selective reconfiguration in polarized lattices with magnet-enabled bistability
Luca Iorio, Raffaele Ardito, Stefano Gonella
The signature topological feature of Maxwell lattices is their polarization, which manifests as an unbalance in stiffness between opposite edges of a finite domain. The manifestati…
Stress control in non-ideal topological Maxwell lattices via geometry
Harry Liu, Siddhartha Sarkar, A. Nafis Arafat +3
Topological mechanical metamaterials have demonstrated exotic and robust mechanical properties which led to promising engineering applications. One of such properties is the focusi…
Omnidirectional domain wall modes protected by fragile topological states
Pegah Azizi, Siddhartha Sarkar, Kai Sun +1
So-called fragile topological states of matter challenge our conventional notion of topology by lacking the robustness typically associated with topological protection, thereby dis…
Robustness of stress focusing in soft lattices under topology-switching deformation
Caleb Widstrand, Xiaoming Mao, Stefano Gonella
Recent developments in topological mechanics have demonstrated the ability of Maxwell lattices to effectively focus stress along domain walls between differently polarized domains.…
Cell augmentation framework for topological lattices
Mohammad Charara, Stefano Gonella
Maxwell lattices are characterized by an equal number of degrees of freedom and constraints. A subset of them, dubbed topological lattices, are capable of localizing stress and def…
Dynamics of self-dual kagome metamaterials and the emergence of fragile topology
Pegah Azizi, Siddhartha Sarkar, Kai Sun +1
Recent years have seen the discovery of systems featuring fragile topological states. These states of matter lack certain protection attributes typically associated with topology a…
Stress focusing and damage protection in topological Maxwell metamaterials
Caleb Widstrand, Chen Hu, Xiaoming Mao +2
Advances in the field of topological mechanics have highlighted a number of special mechanical properties of Maxwell lattices, including the ability to focus zero-energy floppy mod…
Soft mechanical metamaterials with transformable topology protected by stress caching
Jason Christopher Jolly, Binjie Jin, Lishuai Jin +6
Maxwell lattice metamaterials possess a rich phase space with distinct topological states featuring mechanically polarized edge behaviors and strongly asymmetric acoustic responses…
Omnimodal topological polarization of bilayer networks: analysis in the Maxwell limit and experiments on a 3D-printed prototype
Mohammad Charara, James McInerney, Kai Sun +2
Periodic networks on the verge of mechanical instability, called Maxwell lattices, are known to exhibit zero-frequency modes localized to their boundaries. Topologically polarized…
Bandgap tuning in kerfed metastrips under extreme deformation
Caleb Widstrand, Negar Kalantar, Stefano Gonella
The process of kerfing enables planar structures with the ability to undergo dramatic out-of-plane deformation in response to static loads. Starting from flat and stiff sheets, ker…
Topological Flexural Modes in Polarized Bilayer Lattices
Mohammad Charara, Kai Sun, Xiaoming Mao +1
Topological lattices have recently generated a great deal of interest based on the unique mechanical properties rooted in their topological polarization, including the ability to s…
Tunable bandgaps and symmetry breaking in magneto-mechanical metastructures inspired by multi-layer 2D materials
Kuan Zhang, Weijian Jiao, Stefano Gonella
In this Letter, we introduce a paradigm to realize magneto-mechanical metastructures inspired by multi-layer 2D materials, such as graphene bilayers. The metastructures are intende…
Soft topological lattice wheels
William Zunker, Stefano Gonella
We investigate the large deformation and extreme load-management capabilities of a soft topologically polarized kagome lattice mapped to a cylindrical domain through the problem of…
Wavenumber-space band clipping in nonlinear periodic structures
Weijian Jiao, Stefano Gonella
In weakly nonlinear systems, the main effect of cubic nonlinearity on wave propagation is an amplitude-dependent correction of the dispersion relation. This phenomenon can manifest…
Nonlinear harmonic generation in two-dimensional lattices of repulsive magnets
Weijian Jiao, Stefano Gonella
In this Letter, we provide experimental evidence of nonlinear wave propagation in a triangular lattice of repulsive magnets supported by an elastic foundation of thin pillars and w…
Symmetry of the phonon landscape across the duality boundary of twisted kagomes lattices
Stefano Gonella
In this work, we investigate the symmetry of the phonon landscape of twisted kagome lattices across their duality boundary. The study is inspired by recent work by Fruchart et al.…
Dynamics of interacting particle systems: Modeling implications of the repulsive interactions and experiments on magnetic prototypes
Weijian Jiao, Stefano Gonella
In this work, we investigate the dynamics of interacting particle systems subjected to repulsive forces, such as lattices of magnetized particles. To this end, we first develop a g…
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…
Valley-Hall In-Plane Edge States as Building Blocks for Elastodynamic Logic Circuits
Jihong Ma, Kai Sun, Stefano Gonella
In this work, we investigate theoretically and demonstrate experimentally the existence of valley-Hall edge states in the in-plane dynamics of honeycomb lattices with bi-valued str…
Doubly-nonlinear waveguides with self-switching functionality selection capabilities
Weijian Jiao, Stefano Gonella
In this article, we investigate the effects of the interplay between quadratic and cubic nonlinearities on the propagation of elastic waves in periodic waveguides. Through this fra…
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…