Electronic scattering, focusing, and resonance by a spherical barrier in Weyl semimetals
arXiv:1801.04786 · doi:10.1088/1361-648X/aabbbb
Abstract
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.
arXiv comment3 figures. Almost the same as the published version
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