This title appears in the Scientific Report :
2016
Please use the identifier:
http://hdl.handle.net/2128/13277 in citations.
Please use the identifier: http://dx.doi.org/10.1038/ncomms13857 in citations.
Evidence for spin-to-charge conversion by Rashba coupling in metallic states at the Fe/Ge(111) interface3
Evidence for spin-to-charge conversion by Rashba coupling in metallic states at the Fe/Ge(111) interface3
The spin–orbit coupling relating the electron spin and momentum allows for spin generation, detection and manipulation. It thus fulfils the three basic functions of the spin field-effect transistor. However, the spin Hall effect in bulk germanium is too weak to produce spin currents, whereas large R...
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Personal Name(s): | Oyarzún, S. (Corresponding author) |
---|---|
Nandy, A. K. / Rortais, F. / Rojas-Sánchez, J.-C. / Dau, M.-T. / Noël, P. / Laczkowski, P. / Pouget, S. / Okuno, H. / Vila, L. / Vergnaud, C. / Beigné, C. / Marty, A. / Attané, J.-P. / Gambarelli, S. / George, J.-M. / Jaffrès, H. / Blügel, S. / Jamet, M. | |
Contributing Institute: |
Quanten-Theorie der Materialien; IAS-1 JARA - HPC; JARA-HPC JARA-FIT; JARA-FIT Quanten-Theorie der Materialien; PGI-1 |
Published in: | Nature Communications, 7 (2016) S. 13857 |
Imprint: |
London
Nature Publishing Group
2016
|
PubMed ID: |
27976747 |
DOI: |
10.1038/ncomms13857 |
Document Type: |
Journal Article |
Research Program: |
Controlling Configuration-Based Phenomena Controlling Spin-Based Phenomena |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1038/ncomms13857 in citations.
The spin–orbit coupling relating the electron spin and momentum allows for spin generation, detection and manipulation. It thus fulfils the three basic functions of the spin field-effect transistor. However, the spin Hall effect in bulk germanium is too weak to produce spin currents, whereas large Rashba effect at Ge(111) surfaces covered with heavy metals could generate spin-polarized currents. The Rashba spin splitting can actually be as large as hundreds of meV. Here we show a giant spin-to-charge conversion in metallic states at the Fe/Ge(111) interface due to the Rashba coupling. We generate very large charge currents by direct spin pumping into the interface states from 20 K to room temperature. The presence of these metallic states at the Fe/Ge(111) interface is demonstrated by first-principles electronic structure calculations. By this, we demonstrate how to take advantage of the spin–orbit coupling for the development of the spin field-effect transistor. |