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arXiv 1906.06016cond-mat.mtrl-scicond-mat.mes-hall
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La0/ LaAlO3/SrTiO3全外延单晶钙钛矿-氧化物异质结构中的有效本征自旋-电荷电流转换

Efficient intrinsic spin-to-charge current conversion in an all-epitaxial single-crystal perovskite-oxide heterostructure of La0.67Sr0.33MnO3/LaAlO3/SrTiO3

Shinobu Ohya, Daisei Araki, Le Duc Anh, Shingo Kaneta, Munetoshi Seki, Hitoshi Tabata, Masaaki Tanaka

摘要:

我们利用LaSrMnO 3/LaAlO 3(LAO)/SrTiO 3(STO)的全外延单晶异质结构在二维电子气中实现了有效的本征自旋-电荷电流转换,这种异质结构可以抑制自旋散射,为研究本征自旋-电荷转换提供了理想的环境.随着温度降低到20 K,自旋-电荷转换效率急剧提高到+3.9 nm,这是有史以来报道的LAO/STO的最大正值。我们的能带结构计算很好地再现了这种行为,并预测通过控制载流子的密度和弛豫时间进一步增强。

英文摘要:

We demonstrate efficient intrinsic spin-to-charge current conversion in a two-dimensional electron gas using an all-epitaxial single-crystal heterostructure of LaSrMnO3/ LaAlO3 (LAO)/ SrTiO3 (STO), which can suppress spin scattering and give us an ideal environment to investigate intrinsic spin-charge conversion. With decreasing temperature to 20 K, the spin-to-charge conversion efficiency is drastically enhanced to +3.9 nm, which is the largest positive value ever reported for LAO/STO. Our band-structure calculation well reproduces this behavior and predicts further enhancement by controlling the density and relaxation time of the carriers.

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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