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arXiv 1507.02586cond-mat.mes-hall
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Datta-Das调谐不透明度自旋晶体管的量子输运性质

Quantum transport properties in Datta-Das tuned opacity spin-transistors

R. Cuan, J. J. González, L. Diago-Cisneros

摘要:

我们研究了自旋相关的量子输运性质,使用一个简单的建模的Datta-Das自旋晶体管。我们完善以前的结果,通过会计传播介质的不透明度的变化,感受到巡回电子,当栅极电压被打开,并通过横向能级失配建模。监测拓扑依赖的电导,我们能够确定设备的工作点。当入射电子能量接近偏置诱导势垒高度时,自旋分辨电导振荡变得明显。在零温度的图片,我们的计算的自旋依赖电导的电场的函数在栅电极下面的区域建议的可行性建模设备。虽然我们证明了相位时间可能不是自旋分辨的,但我们的模拟使我们能够评估电子经历自旋翻转过程所需的时间,从而使自旋弛豫时间的数量级低于典型值。

英文摘要:

We studied the spin-dependent quantum transport properties using a simple modelling of a Datta-Das spin transistor. We refine previous results by accounting the propagation medium changes of opacity felt by itinerant electrons, when the gate-voltage is switched on and modelling them via the transversal energy levels mismatch. Monitoring the topological-dependent conductance, we are able to identify the device operating points. If the incoming electrons energy approaches the biased-induced barriers height, the spin-resolved conductance oscillations become significant. In a zero temperature picture, our computations of the spin-dependent conductance as function of the electric field at the region below the gate electrode suggest the feasibility of the modeled device. Although we demonstrate that phase time may not be spin-resolved, our simulation allows us to evaluate the time that takes an electron to experience a spin-flip process, resulting in an order of magnitude lower than typical values of the spin relaxation times.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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