Interfacial spin-filter assisted spin transfer torque effect in Co/BeO/Co magnetic tunnel junction

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题名:	Interfacial spin-filter assisted spin transfer torque effect in Co/BeO/Co magnetic tunnel junction
作者:	唐毓慧;Tang, Y.-H.;Chu, F.-C.
贡献者:	理學院物理學系
关键词:	Applied physics;BERYLLIUM OXIDES;Charge transfer;COBALT;Computer simulation;COMPUTERIZED SIMULATION;CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;CURRENT DENSITY;FCC LATTICES;First principles;HETEROJUNCTIONS;INTERFACES;MAGNETISM;SEMICONDUCTOR MATERIALS;SPIN;SPIN ORIENTATION;Spintronics;Torque;TUNNEL EFFECT;Tunnel junctions;Wurtzite
日期:	2015-03-07
上传时间:	2026-04-23 12:06:40 (UTC+8)
出版者:	American Institute of Physics;Melville: American Institute of Physics
摘要:	摘要： The first-principles calculation is employed to demonstrate the spin-selective transport properties and the non-collinear spin-transfer torque (STT) effect in the newly proposed Co/BeO/Co magnetic tunnel junction. The subtle spin-polarized charge transfer solely at O/Co interface gives rise to the interfacial spin-filter (ISF) effect, which can be simulated within the tight binding model to verify the general expression of STT. This allows us to predict the asymmetric bias behavior of non-collinear STT directly via the interplay between the first-principles calculated spin current densities in collinear magnetic configurations. We believe that the ISF effect, introduced by the combination between wurtzite-BeO barrier and the fcc-Co electrode, may open a new and promising route in semiconductor-based spintronics applications. 出版者： Melville: American Institute of Physics 出版日期： 2015-03-07 出處： Journal of applied physics, 2015-03, Vol.117 (9) 資源來源： AIP Publishing Journals 版權： 2015 AIP Publishing LLC. 識別號： ISSN: 0021-8979 識別號： EISSN: 1089-7550 識別號： DOI: 10.1063/1.4913780
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