70 citations · 326 across the 12 of their papers we have counts for
12 papers
Single-particle limit of a topological edge state in a locally resonant band gap
Garigipati Sai Srikanth, Kai Qian, Ian Frankel +3
Topological metamaterials promise unprecedented wave control. Here, we theoretically and numerically investigate a one-dimensional Su-Schrieffer-Heeger (SSH)-inspired stiffness dim…
Nonlinearity-induced corner states in a kagome lattice
K Prabith, Georgios Theocharis, Rajesh Chaunsali
Nonlinearity provides a powerful mechanism for controlling energy localization in structured dynamical systems. In this study, we investigate the emergence of nonlinearity-induced…
Edge States with Hidden Topology in Spinner Lattices
Udbhav Vishwakarma, Murthaza Irfan, Georgios Theocharis +1
Symmetries -- whether explicit, latent, or hidden -- are fundamental to understanding topological materials. This work introduces a prototypical spring-mass model that extends beyo…
Topological phase transition in disordered elastic quantum spin Hall system
Xiaotian Shi, Rajesh Chaunsali, Georgios Theocharis +3
We investigate the effect of disorder on topologically nontrivial states in a two dimension (2D) mechanical system. We first propose a quantum spin Hall (QSH) insulator based on an…
Dirac Solitons and Topological Edge States in the -Fermi-Pasta-Ulam-Tsingou dimer lattice
Rajesh Chaunsali, Panayotis G. Kevrekidis, Dimitri Frantzeskakis +1
We consider a dimer lattice of the Fermi-Pasta-Ulam-Tsingou (FPUT) type, where alternating linear couplings have a controllably small difference, and the cubic nonlinearity (-FP…
Bulk-edge correspondence in the trimer Su-Schrieffer-Heeger model
Adamantios Anastasiadis, Georgios Styliaris, Rajesh Chaunsali +2
A remarkable feature of the trimer Su-Schrieffer-Heeger (SSH3) model is that it supports localized edge states. Although Zak's phase remains quantized for the case of a mirror-symm…
Topological state transfer in Kresling origami
Yasuhiro Miyazawa, Chun-Wei Chen, Rajesh Chaunsali +4
Topological mechanical metamaterials have been widely explored for their boundary states, which can be robustly isolated or transported in a controlled manner. However, such system…
Nonlinear Topological Edge States: from Dynamic Delocalization to Thermalization
Bertin Many Manda, Rajesh Chaunsali, Georgios Theocharis +1
We consider a mechanical lattice inspired by the Su-Schrieffer-Heeger model along with cubic Klein-Gordon type nonlinearity. We investigate the long-time dynamics of the nonlinear…
Disorder-induced topological phase transition in a 1D mechanical system
Xiaotian Shi, Ioannis Kiorpelidis, Rajesh Chaunsali +3
We numerically investigate the topological phase transition induced purely by disorder in a spring-mass chain. We employ two types of disorders - chiral and random types - to explo…
Stability of topological edge states under strong nonlinear effects
Rajesh Chaunsali, Haitao Xu, Jinkyu Yang +2
We examine the role of strong nonlinearity on the topologically-robust edge state in a one-dimensional system. We consider a chain inspired from the Su-Schrieffer-Heeger model, but…
Corner states in second-order mechanical topological insulator
Chun-Wei Chen, Rajesh Chaunsali, Johan Christensen +2
We numerically and experimentally study corner states in a continuous elastic plate with em-bedded bolts in a hexagonal pattern. While preserving C6 crystalline symmetry, the syste…
Self-induced topological transition in phononic crystals by nonlinearity management
Rajesh Chaunsali, Georgios Theocharis
A new design paradigm of topology has recently emerged to manipulate the flow of phonons. At its heart lies a topological transition to a nontrivial state with exotic properties. T…