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arXiv 2006.14958cond-mat.mes-hall
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氧化物二维电子气中的自旋和轨道Edelstein效应:理论和对AlO $_x$ / SrTiO $_{3}$的应用

Spin and orbital Edelstein effect in an oxide two-dimensional electron gas: theory and application to AlO$_x$/SrTiO$_{3}$

Annika Johansson, Börge Göbel, Jürgen Henk, Manuel Bibes, Ingrid Mertig

摘要:

Edelstein效应提供了纯电产生和控制具有破缺反转对称性的主要是磁性材料中的均匀磁化。通常,只讨论自旋密度对外部电场的响应。在这里,我们报告的电诱导磁化包含自旋以及在拓扑氧化物的二维电子气在SrTiO $_3$和AlO之间的界面的轨道贡献。我们发现,在这个特定的系统中,轨道Edelstein效应超过自旋Edelstein效应超过一个数量级以上。主要原因是类Rashba分裂带对中不同量级的轨道矩。

英文摘要:

The Edelstein effect provides the purely electrical generation and control of a homogeneous magnetization in primarily nonmagnetic materials with broken inversion symmetry. Usually, only the spin density response to an external electric field is discussed. Here, we report on the electrically induced magnetization containing spin as well as orbital contributions in the topological oxide two-dimensional electron gas at the interface between SrTiO$_3$ and AlO. We find that in this particular system the orbital Edelstein effect exceeds the spin Edelstein effect by more than one order of magnitude. The main reason are orbital moments of different magnitude in the Rashba-like-split band pairs.

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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