期刊
IEEE TRANSACTIONS ON ELECTRON DEVICES
卷 54, 期 5, 页码 933-944出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TED.2007.894365
关键词
bias dependence; electrical design; spin injection and detection; spintronics
Spin selectivity has already been demonstrated for both injection and (recently) detection contacts on semiconductors, but a clear demonstration of a magnetoresistance signal is still lacking. After outlining the various categories of device proposals and the associated choice of semiconductor material, we summarize the various injection contact technologies that have been reported and assess their potential for practical device applications in terms of electrical efficiency, bias dependence (both intrinsic and extrinsic), and performance in unipolar devices. We then focus on the design of an all-electrical injection-detection device in GaAs and demonstrate that a correct design of the semiconductor channel and contact regions is the key for preserving the spin sensitivity that is provided by the contacts.
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