39 citations · 164 across the 13 of their papers we have counts for
13 papers
Anomalous in-gap edge states in two-dimensional pseudospin-1 Dirac insulators
Hong-Ya Xu, Ying-Cheng Lai
Quantum materials that host a flat band, such as pseudospin-1 lattices and magic-angle twisted bilayer graphene, can exhibit drastically new physical phenomena including unconventi…
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…
Interplay of Lorentz-Berry forces in position-momentum spaces for valley-dependent impurity scattering in alpha-T3 lattices
Danhong Huang, Andrii Iurov, Hong-Ya Xu +2
The Berry-phase mediated valley-selected skew scattering in alpha-T3 lattices is demonstrated. The interplay of Lorentz and Berry forces in position and momentum spaces is revealed…
Can a photonic thermalization gap arise in disordered non-Hermitian Hamiltonian systems?
Guang-Lei Wang, Hong-Ya Xu, Ying-Cheng Lai
The phenomenon of chiral-symmetry protected thermalization gap in Hermitian photonic systems is counterintuitive as it implies that the photon coherence can be continuously improve…
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…
Chaos in Dirac electron optics: Emergence of a relativistic quantum chimera
Hong-Ya Xu, Guang-Lei Wang, Liang Huang +1
We uncover a remarkable quantum scattering phenomenon in two-dimensional Dirac material systems where the manifestations of both classically integrable and chaotic dynamics emerge…
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…
Emergence, evolution, and control of multistability in a hybrid topological quantum/classical system
Guanglei Wang, Hongya Xu, Ying-Cheng Lai
We present a novel class of nonlinear dynamical systems - a hybrid of relativistic quantum and classical systems, and demonstrate that multistability is ubiquitous. A representativ…
Superscattering of pseudospin-1 wave in photonic lattice
Hong-Ya Xu, Ying-Cheng Lai
We uncover a superscattering behavior of pseudospin-1 wave from weak scatterers in the subwavelength regime where the scatterer size is much smaller than wavelength. The phenomenon…
Relativistic Zitterbewegung in non-Hermitian photonic waveguide systems
Guanglei Wang, Hongya Xu, Liang Huang +1
Zitterbewegung (ZB) is a phenomenon in relativistic quantum systems where the electron wave packet exhibits a trembling or oscillating behavior during its motion, caused by its int…
GOE statistics in graphene billiards with the shape of classically integrable billiards
Pei Yu, Zi-Yuan Li, Hong-Ya Xu +4
A crucial result in quantum chaos, which has been established for a long time, is that the spectral properties of classically integrable systems generically are described by Poisso…