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  Spin and orbital Edelstein effects in a two-dimensional electron gas: Theory and application to SrTiO3 interfaces

Johansson, A., Göbel, B., Henk, J., Bibes, M., & Mertig, I. (2021). Spin and orbital Edelstein effects in a two-dimensional electron gas: Theory and application to SrTiO3 interfaces. Physical Review Research, 3(1): 013275. doi:10.1103/PhysRevResearch.3.013275.

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Johansson, Annika1, Author
Göbel, Börge2, Author              
Henk, Jürgen1, Author
Bibes, Manuel1, Author
Mertig, Ingrid1, Author
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1External Organizations, ou_persistent22              
2Max Planck Institute of Microstructure Physics, Max Planck Society, ou_2415691              

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 Abstract: The Edelstein effect produces a homogeneous magnetization in nonmagnetic materials with broken inversion symmetry which is generated and tuned exclusively electrically. Often the spin Edelstein effect-that is, a spin density in response to an applied electric field-is considered. In this paper we report on the electrically induced magnetization that comprises contributions from the spin and the orbital moments. Our theory for these spin and orbital Edelstein effects is applied to the topologically nontrivial two-dimensional electron gas at SrTiO3 interfaces. In this particular system the orbital Edelstein effect exceeds the spin Edelstein effect by more than one order of magnitude. This finding is explained mainly by orbital moments of different magnitude in the Rashba-like split band pairs, while the spin moments are of almost equal magnitude.

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 Dates: 2021-03-24
 Publication Status: Published in print
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Title: Physical Review Research
Source Genre: Journal
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Publ. Info: College Park, Maryland, United States : American Physical Society (APS)
Pages: - Volume / Issue: 3 (1) Sequence Number: 013275 Start / End Page: - Identifier: ISSN: 2643-1564
CoNE: https://pure.mpg.de/cone/journals/resource/2643-1564