TY  - JOUR
AU  - Oyarzún, S.
AU  - Nandy, A. K.
AU  - Rortais, F.
AU  - Rojas-Sánchez, J.-C.
AU  - Dau, M.-T.
AU  - Noël, P.
AU  - Laczkowski, P.
AU  - Pouget, S.
AU  - Okuno, H.
AU  - Vila, L.
AU  - Vergnaud, C.
AU  - Beigné, C.
AU  - Marty, A.
AU  - Attané, J.-P.
AU  - Gambarelli, S.
AU  - George, J.-M.
AU  - Jaffrès, H.
AU  - Blügel, S.
AU  - Jamet, M.
TI  - Evidence for spin-to-charge conversion by Rashba coupling in metallic states at the Fe/Ge(111) interface3
JO  - Nature Communications
VL  - 7
SN  - 2041-1723
CY  - London
PB  - Nature Publishing Group
M1  - FZJ-2016-07648
SP  - 13857
PY  - 2016
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000390173500001
C6  - pmid:27976747
DO  - DOI:10.1038/ncomms13857
UR  - https://juser.fz-juelich.de/record/825175
ER  -