22 citations · 56 across the 8 of their papers we have counts for
8 papers
Nonlinearity-induced Scattering Zero Degeneracies for Spectral Management of Coherent Perfect Absorption in Complex Systems
Cheng-Zhen Wang, John Guillamon, William Tuxbury +2
We develop a Coherent Perfect Absorption (CPA) protocol for cases where scale invariance is violated due to the presence of nonlinear mechanisms. We demonstrate, using a microwave…
An experimental scheme for determining the Berry phase in two-dimensional quantum materials with a flat band
Li-Li Ye, Cheng-Zhen Wang, Ying-Cheng Lai
Experimentally feasible methods to determine the Berry phase, a fundamental quantity characterizing a quantum material, are often needed in applications. We develop an approach to…
Bound states in the continuum induced via local symmetries in complex structures
Cheng-Zhen Wang, Ulrich Kuhl, Adin Dowling +2
Bound states in the continuum (BICs) defy conventional wisdom that assumes a spectral separation between propagating waves, that carry energy away, and spatially localized waves co…
Scattering of Dirac electrons from a skyrmion: emergence of robust skew scattering
Cheng-Zhen Wang, Hong-Ya Xu, Ying-Cheng Lai
We study electron scattering from a closed magnetic structure embedded in the top surface of a topological insulator (TI). Outside the structure there is a uniform layer of ferroma…
Chaos based Berry phase detector
Cheng-Zhen Wang, Chen-Di Han, Hong-Ya Xu +1
The geometric or Berry phase, a characteristic of quasiparticles, is fundamental to the underlying quantum materials. The discoveries of new materials at a rapid pace nowadays call…
Phase locking of a pair of nano ferromagnetic oscillators on a topological insulator
Cheng-Zhen Wang, Hong-Ya Xu, Nicholas D. Rizzo +2
We investigate the magnetization dynamics of a pair of ferromagnetic insulators (FMIs) deposited on the surface of a topological insulator (TI). Due to the nonlinear nature of the…
Decay of semiclassical massless Dirac fermions from integrable and chaotic cavities
Chen-Di Han, Cheng-Zhen Wang, Hong-Ya Xu +2
Conventional microlasing of electromagnetic waves requires (1) a high cavity and (2) a mechanism for directional emission. Previous theoretical and experimental work demonstrat…
Non-equilibrium transport in the pseudospin-1 Dirac-Weyl system
Cheng-Zhen Wang, Hong-Ya Xu, Liang Huang +1
Solid state materials hosting pseudospin-1 quasiparticles have attracted a great deal of recent attention. In these materials, the energy band contains of a pair of Dirac cones and…