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arXiv 0709.3556cond-mat.mtrl-scicond-mat.other
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磁性隧道结中的动态自旋极化共振隧穿

Dynamic Spin-Polarized Resonant Tunneling in Magnetic Tunnel Junctions

Casey W. Miller, Zhi-Pan Li, Ivan K. Schuller, R. W. Dave, J. M. Slaughter, Johan Akerman

摘要:

精确设计的隧道结表现出长期寻求的效果,当电子的能量与隧道势垒的势能相当时,就会出现这种效果。当直接隧穿到势垒的导带中的电子在经典转折点处反射时,金属-绝缘体-金属隧道结的电阻随着施加的电压振荡:绝缘体-金属界面,以及入射电子能量等于绝缘体内的势垒的动态点。利用薛定谔方程的精确解建立的梯形隧道势垒的自由电子带间隧穿模型与实验定性一致。

英文摘要:

Precisely engineered tunnel junctions exhibit a long sought effect that occurs when the energy of the electron is comparable to the potential energy of the tunneling barrier. The resistance of metal-insulator-metal tunnel junctions oscillates with an applied voltage when electrons that tunnel directly into the barrier's conduction band interfere upon reflection at the classical turning points: the insulator-metal interface, and the dynamic point where the incident electron energy equals the potential barrier inside the insulator. A model of tunneling between free electron bands using the exact solution of the Schroedinger equation for a trapezoidal tunnel barrier qualitatively agrees with experiment.

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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