AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland.
J Phys Condens Matter. 2012 Feb 29;24(8):085801. doi: 10.1088/0953-8984/24/8/085801. Epub 2012 Jan 26.
We study the electron transport in three terminal junctions and quantum rings looking for the classical deflection of electron trajectories in the presence of intersubband scattering. We indicate that although the Aharonov-Bohm oscillations and the Lorentz force effects co-exist in the low subband transport, for higher Fermi energies a simultaneous observation of both effects is difficult and calls for carefully formed structures. In particular, in quantum rings with channels wider than the input lead the Lorentz force is well resolved but the Aharonov-Bohm periodicity is lost in chaotic scattering events. In quantum rings with equal lengths of the channels and T-shaped junctions the Aharonov-Bohm oscillations are distinctly periodic but the Lorentz force effects are not well pronounced. We find that systems with wedge-shaped junctions allow for observation of both the periodic Aharonov-Bohm oscillations and the magnetic deflection.
我们研究了三端结和量子环中的电子输运，寻找在子带间散射存在的情况下电子轨迹的经典偏转。我们指出，尽管在低子带输运中存在 Aharonov-Bohm 振荡和洛伦兹力效应的共存，但对于更高的费米能量，同时观察到这两种效应是困难的，需要精心设计结构。特别是在通道宽度大于输入引线的量子环中，洛伦兹力得到了很好的解决，但在混沌散射事件中，Aharonov-Bohm 周期性会丢失。在通道长度相等的量子环和 T 型结中，Aharonov-Bohm 振荡明显具有周期性，但洛伦兹力效应不明显。我们发现，楔形结的系统允许观察到周期性的 Aharonov-Bohm 振荡和磁偏转。
