93 citations · 555 across the 30 of their papers we have counts for
30 papers
Flat Midgap Topological Surface and Hypersurface Bands without Parameter Tuning
Keun Hyuk Ahn
The Su-Schrieffer-Heeger model is extended to the three and higher dimensional systems. Nearly or absolutely flat midgap surface and hypersurface bands are predicted based on the t…
Observation of Phase Controllable Majorana-like Bound States in Metamaterial-based Kitaev Chain Analogues
Kai Qian, David J. Apigo, Karmela Padavić +3
We experimentally demonstrate that Majorana-like bound states (MLBSs) can occur in quasi-one-dimensional metamaterials, analogous to Majorana zero modes (MZM) in the Kitaev chain.…
Observation of Flat Frequency Bands at Open Edges and Antiphase Boundary Seams in Topological Mechanical Metamaterials
Kai Qian, Linghua Zhu, Keun Hyuk Ahn +1
Motivated by the recent theoretical studies on a two-dimensional (2D) chiral Hamiltonian based on the Su-Schrieffer-Heeger chains, we experimentally and computationally demonstrate…
Flat Energy Bands within Antiphase and Twin Boundaries and at Open Edges in Topological Materials
Linghua Zhu, Emil Prodan, Keun Hyuk Ahn
A model for two-dimensional electronic, photonic, and mechanical metamaterial systems is presented, which has flat one-dimensional zero-mode energy bands and stable localized state…
Photoinduced Nonequilibrium Dynamics in Charge Ordered Materials
Linghua Zhu, Tsezar F. Seman, Michel van Veenendaal +1
We study the nonequilibrium dynamics of photoinduced phase transitions in charge ordered (CO) systems with a strong electron-lattice interaction and analyze the interplay between e…
Pressure Dependent Structural Changes and Predicted Electrical Polarization in Perovskite RMnO3
T. Wu, T. A. Tyson, H. Chen +7
High pressure x-ray diffraction (XRD) measurements on RMnO3 (R=Dy, Ho and Lu) reveals that varying structural changes occurs for different R ions. Large lattice changes (orthorhomb…