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Spin polarization of two-dimensional electron gas in a hybrid magnetic-electric barrier

机译:混合磁电势垒中二维电子气的自旋极化

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We report on a theoretical study of spin-dependent electron transport in a two-dimensional electron gas (2DEG) modulated by a stripe of ferromagnetic metal under an applied voltage. A general formula of transmission probability for electronic tunneling through this system is obtained. Based on this formula, it is shown that large spin-polarized current can be achieved in such a device. It is also shown that the degree of electron-spin polarization is strongly dependent upon the applied voltage to the stripe in the device. These interesting properties may provide an alternative scheme to spin-polarize electrons into semiconductors, and this device may be used as a voltage-tunable spin-filter. (c) 2005 Elsevier Ltd. All rights reserved.
机译:我们报告了在施加电压下由铁磁金属条调制的二维电子气(2DEG)中自旋相关电子传输的理论研究。获得了通过该系统进行电子隧穿的传输概率的一般公式。根据该公式,表明在这种装置中可以实现大的自旋极化电流。还显示出电子自旋极化的程度强烈地取决于施加到器件中的条的电压。这些有趣的特性可以提供一种将电子自旋极化为半导体的替代方案,并且该器件可以用作电压可调自旋滤波器。 (c)2005 Elsevier Ltd.保留所有权利。

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