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  Spin Orientation of Two-Dimensional Electrons Driven by Temperature-Tunable Competition of Spin-Orbit and Exchange-Magnetic Interactions

Generalov, A., Otrokov, M. M., Chikina, A., Kliemt, K., Kummer, K., Hoeppner, M., et al. (2017). Spin Orientation of Two-Dimensional Electrons Driven by Temperature-Tunable Competition of Spin-Orbit and Exchange-Magnetic Interactions. Nano Letters, 17(2), 811-820. doi:10.1021/acs.nanolett.6b04036.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-E04B-A Version Permalink: http://hdl.handle.net/21.11116/0000-0000-6E15-E
Genre: Journal Article

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 Creators:
Generalov, Alexander1, Author
Otrokov, Mikhail M.1, Author
Chikina, Alla1, Author
Kliemt, Kristin1, Author
Kummer, Kurt1, Author
Hoeppner, Marc1, Author
Guettler, Monika1, Author
Seiro, Silvia2, Author              
Fedorov, Alexander1, Author
Schulz, Susanne1, Author
Danzenbaecher, Steffen1, Author
Chulkov, Evgueni V.1, Author
Geibel, Christoph3, Author              
Laubschat, Clemens1, Author
Dudin, Pavel1, Author
Hoesch, Moritz1, Author
Kim, Timur1, Author
Radovic, Milan1, Author
Shi, Ming1, Author
Plumb, Nicholas C.1, Author
Krellner, Cornelius1, AuthorVyalikh, Denis V.1, Author more..
Affiliations:
1External Organizations, ou_persistent22              
2Silvia Seiro, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863473              
3Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863465              

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 Abstract: Finding ways to create and control the spin-dependent properties of two-dimensional electron states (2DESs) is a major challenge for the elaboration of novel spin based devices. Spin orbit and exchange magnetic interactions (SOI and EMI) are two fundamental fundamental mechanisms that enable access to the tunability of spin-dependent properties of carriers. The silicon surface of HoRh2Si2 appears to be a unique model system, where concurrent SOT and EMI can be visualized and controlled by varying the temperature. The beauty and simplicity of this system lie in the 4f moments, which act as a multiple tuning instrument on the 2DESs, as the 4f projections parallel and perpendicular to the surface order at essentially different temperatures. Here we show that the SOI locks the spins of the 2DESs exclusively in the surface plane when the 4f moments are disordered: the Rashba-Bychkov effect. When the temperature is gradually lowered and the system experiences magnetic order, the rising EMI progressively competes with the SOT leading to a fundamental change in the spin-dependent properties of the 2DESs. The spins rotate and reorient toward the out-of-plane Ho 4f moments. Our findings show that the direction of the spins and the spin-splitting of the two-dimensional electrons at the surface can be manipulated in a controlled way by using only one parameter: the temperature.

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Language(s): eng - English
 Dates: 2017-01-132017-01-13
 Publication Status: Published in print
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Title: Nano Letters
  Abbreviation : Nano Lett.
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 17 (2) Sequence Number: - Start / End Page: 811 - 820 Identifier: ISSN: 1530-6984
CoNE: /journals/resource/110978984570403