2023/11/17 by Josh Wanninger, Wanninger, Josh, Gonzalo Ordóñez +1
Physics and Astronomy · #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Photonic Crystals and Applications #Quantum Physics (quant-ph) #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices
paper · pdf · doi:10.48550/arxiv.2311.10853
openalex publication_date 2023/11/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We simulated modifications to a model of a two-dimensional paramagnetic semiconductor called the half-BHZ model, also known as the QWZ model, and simulated a modified full BHZ model, where a time reversal pair is introduced. Our modifications to the models include adding single and multiple impurities connected to the lattices or as a connection between the time-reversal pairs. We employed the Julia programming language to show how to speed up calculations for time evolutions. By simulating the time evolutions, we could observe the differences in the effects of these modifications. Our simulations showed the presence of scattering behavior associated with the infinite QWZ model topological states. Moreover, we observed scattering and absorption behavior related to the parameters and placements of impurities and Hamiltonian imaginary component's symmetry or anti-symmetry. These tools and early results lay the foundations for developing electronic devices that use the models' unique scattering and absorption behaviors and explore more complex and physically accurate modifications to the models.