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首页> 外文期刊>Journal of Experimental and Theoretical Physics >Electron and spin transport in adiabatic quantum pumps based on graphene nanoribbons
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Electron and spin transport in adiabatic quantum pumps based on graphene nanoribbons

机译：基于石墨烯纳米带的绝热量子泵中的电子和自旋输运

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摘要

The adiabatic quantum pump effect in double-barrier structures based on graphene nanoribbons has been analyzed numerically. The charge transmitted through the system in one cycle of variation of pumping potentials (barrier heights) has been calculated. This charge is shown to be quantized under certain conditions. The possibility of the generation of not only electron currents but also spin and purely spin ones is considered. In devices based on zigzag nanoribbons, the spin current emerges when taking into account their magnetic structure and applying a transverse electric field breaking the symmetry between the up and down spins. In devices based on armchair nanoribbons without any magnetic structure, this symmetry breaks when using a ferromagnetic insulator (deposited, for example, on the region between gates) through the proximity effect.
机译：数值分析了基于石墨烯纳米带的双势垒结构中的绝热量子泵效应。已计算出泵送电势（势垒高度）变化的一个周期中通过系统传输的电荷。该电荷显示在某些条件下被量化。考虑了不仅产生电子电流而且产生自旋和纯自旋电流的可能性。在基于之字形纳米带的设备中，考虑到其磁性结构并施加横向电场破坏上下自旋之间的对称性，就会出现自旋电流。在不具有任何磁性结构的基于扶手椅纳米带的设备中，当使用铁磁绝缘体（例如，沉积在浇口之间的区域）通过邻近效应时，这种对称性会破坏。

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