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Breakdown of Conventional Winding Number Calculation in One-Dimensional Lattices with Interactions Beyond Nearest Neighbors
Amir Rajabpoor Alisepahi, Siddhartha Sarkar, Kai Sun +1
Topological insulators hold promises to realize exotic quantum phenomena in electronic, photonic, and phononic systems. Conventionally, topological indices, such as winding numbers…
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…
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…
Universal Continuum Theory for Topological Edge Soft Modes
Kai Sun, Xiaoming Mao
Topological edge zero modes and states of self stress have been intensively studied in discrete lattices at the Maxwell point, offering robust properties concerning surface and int…
Ultrafast decoupling of atomic sublattices in a charge-density-wave material
Jun Li, Junjie Li, Kai Sun +12
Atomic rearrangements within crystals lie at the foundation of electron-phonon-coupled phenomena such as metal-insulator transition and superconductivity. Advanced laser-pump-probe…