论文标题
非均匀晶格磁性隧道连接
Non-uniform Superlattice Magnetic Tunnel Junctions
论文作者
论文摘要
我们建议使用线性，高斯，洛伦兹和pöschl-teller宽度和高度宽度和高度的特征表现出一类新的非均匀超晶体磁力隧道连接（NU-SLTJS），并在TMR中表现出可观的增强（$ 10^4-10^6 \％$ $），并在折叠率上表现出可观的增强，并在$ 9上折叠了$ \ $。宽带旋转过滤的物理。通过探索各种NU-SLTJ的电流 - 电压特性中的负差分电阻区域，我们预测NU-SLTJs以几百个picseconds的顺序提供了最快的自旋传输扭矩切换。我们一致地利用原子不平衡的绿色功能形式主义以及Landau-Lifshitz-Gilbert-Slonczewski方程来评估各种NU-SLTJ的设备性能。我们还介绍了具有显着TMR（$ \ $ \ 10^4 \％\％$）和大型旋转电流的最小三屏障NU-SLTJ的设计。我们希望这项工作中提出的NU-SLTJ类可以放置基岩，以启动令人振奋的航行，即探索下一代Spintronic设备的各种非均匀超级晶格。
We propose a new class of non-uniform superlattice magnetic tunnel junctions (Nu-SLTJs) with the Linear, Gaussian, Lorentzian, and Pöschl-teller width and height based profiles manifesting a sizable enhancement in the TMR($\approx 10^4-10^6\%$) with a significant suppression in the switching bias($\approx$9 folds) owing to the physics of broad-band spin filtering. By exploring the negative differential resistance region in the current-voltage characteristics of the various Nu-SLTJs, we predict the Nu-SLTJs offer the fastest spin transfer torque switching in the order of a few hundred picoseconds. We self-consistently employ the atomistic non-equilibrium Green's function formalism coupled with the Landau-Lifshitz-Gilbert-Slonczewski equation to evaluate the device performance of the various Nu-SLTJs. We also present the design of minimal three-barrier Nu-SLTJs having significant TMR($\approx 10^4\%$) and large spin current for ease of device fabrication. We hope that the class of Nu-SLTJs proposed in this work may lay the bedrock to embark on the exhilarating voyage of exploring various non-uniform superlattices for the next generation of spintronic devices.
