2018/01/31 by Ming Lu, Xiao-Xiao Zhang · 3 citations
Materials Science · Physics and Astronomy · #Angular momentum #Caustic (mathematics) #Electron #Graphene research and applications #Momentum (technical analysis) #Polar #Quantum #Quantum and electron transport phenomena #Resonance (particle physics) #Semimetal #Topological Materials and Phenomena #cond-mat.mes-hall #cond-mat.mtrl-sci #quant-ph
paper · pdf · doi:10.1088/1361-648x/aabbbb
published in Journal of Physics Condensed Matter 30(21), 215303 (IOP Publishing) · 3 figures. Almost the same as the published version
arxiv created 2018/04/05 · openalex publication_date 2018/04/05 · openalex created_date 2018/04/13 · arxiv updated 2018/05/07 · openalex updated_date 2026/08/05
We solve the Weyl electron scattered by a spherical step potential barrier. Tuning the incident energy and the potential radius, one can enter both quasiclassical and quantum regimes. Transport features related to far-field currents and integrated cross sections are studied to reveal the preferred forward scattering. In the quasiclassical regime, a strong focusing effect along the incident spherical axis is found in addition to optical caustic patterns. In the quantum regime, at energies of successive angular momentum resonances, a polar aggregation of electron density is found inside the potential. The findings will be useful in transport studies and electronic lens applications in Weyl systems.