Effect of Barrier’s Geometry on the Transport Properties of Gaussian Wave-Packet in the Presence of Rashba and Dresselhaus Spin-Orbit Interactions: Comparison of High-Energy and Low-Energy Wave-Packets | ||
| Progress in Physics of Applied Materials | ||
| دوره 2، شماره 2 - شماره پیاپی 3، اسفند 2022، صفحه 113-121 اصل مقاله (979.91 K) | ||
| نوع مقاله: Original Article | ||
| شناسه دیجیتال (DOI): 10.22075/ppam.2022.28940.1038 | ||
| نویسندگان | ||
| Maryam Sabzevar* ؛ Mehdi Solaimani | ||
| Department of Physics, Qom University of Technology, Qom, Iran | ||
| چکیده | ||
| A Gaussian wave-packet quantum tunneling across a one-dimensional double-barrier structure has been explored in order to obtain the spin-based transport coefficients. We have used a split-step finite difference method to solve the resulting nonlinear coupled Schrodinger equations. The related behavior of scattering properties of the system as a function of the geometry of the barriers in the presence of Rashba and Dresselhaus spin-orbit interactions for High-energy and low-energy wave-packets have been compared. Evidence showed that the presence of Rashba or Dresselhaus SOIs leads to considerable spin polarization in the wave-packet components. Based on the results, it is found that the wave-packet velocity plays a significant role in the tunneling process of the Gaussian wave-packet through quantum barriers. In addition, by tuning the Rashba and the Dresselhaus coupling strengths, the energy of the wave-packet, and the characteristics of the system, one can control the spin polarization of the wave-packet and its propagation coefficients. | ||
| کلیدواژهها | ||
| Rashba Spin-Orbit interaction؛ Dresselhaus Spin-Orbit interaction؛ spin-polarizedGaussian wave-packet؛ transmission coefficient؛ reflection coefficient؛ trapping coefficient | ||
| مراجع | ||
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