自旋电子学
凝聚态物理
异质结
材料科学
居里温度
铁磁性
自旋霍尔效应
矫顽力
自旋极化
物理
电子
量子力学
作者
Brahim Marfoua,Jisang Hong
标识
DOI:10.1016/j.mtphys.2024.101378
摘要
The spin-orbit torque (SOT) phenomenon is crucial for advancing spintronics. Therefore, we explore the SOT efficiency in the WTe2/Fe3GaTe2 heterostructure. The WTe2/Fe3GaTe2 heterostructure has a ferromagnetic ground state with a perpendicular magnetic anisotropy. Through the Metropolis Monte Carlo simulations, we find that the WTe2/Fe3GaTe2 heterostructure has a Curie temperature of 345 K. We also calculate the temperature-dependent coercive field HC(T) via the extended Landau-Lifshitz-Gilbert (LLG) equation, and the estimated coercive field is 0.32 T at 300 K. From the electrical and spin Hall conductivity of the WTe2 layer, we obtain a giant spin Hall angle of ∼4 is obtained at a low chemical potential. Besides, the WTe2/Fe3GaTe2 heterostructure exhibits a critical current density of ∼7.40 × 104 A/cm2 at 300 K. This value is superior to that found in most previously reported materials. Finally, we achieve the switching power consumption of approximately 1.80 × 1015 W/m3 at 300 K, and this is comparable to or even lower than the values found in other bulk type or thick thickness SOT materials. Due to this highly efficient SOT performance, the ultrathin WTe2/Fe3GaTe2 heterostructure may offer a promising avenue for advanced room temperature spintronic applications with implications for both fundamental research and technological advancements.
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