Katsaros, GeorgiosIST Austria; Golovach, Vitaly N; Spathis, Panayotis N; Ares, Natalia; Stoffel, Mathieu; Fournel, Frank; Schmidt, Oliver G; Glazman, Leonid I; De Franceschi, Silvano
Spin-selective tunneling of holes in SiGe nanocrystals contacted by normal-metal leads is reported. The spin selectivity arises from an interplay of the orbital effect of the magnetic field with the strong spin-orbit interaction present in the valence band of the semiconductor. We demonstrate both experimentally and theoretically that spin-selective tunneling in semiconductor nanostructures can be achieved without the use of ferromagnetic contacts. The reported effect, which relies on mixing the light and heavy holes, should be observable in a broad class of quantum-dot systems formed in semiconductors with a degenerate valence band.
Physical Review Letters
The work was supported by the Agence Nationale de la Recherche (through the ACCESS and COHESION projects), U.S. DOE Contract No. DE-FG02-08ER46482 (Yale), and the Nanosciences Foundation at Grenoble, France. G. K. acknowledges support from the Deutsche Forschungsgemeinschaft
Katsaros G, Golovach V, Spathis P, et al. Observation of spin-selective tunneling in sige nanocrystals. Physical Review Letters. 2011;107(24). doi:10.1103/PhysRevLett.107.246601
Katsaros, G., Golovach, V., Spathis, P., Ares, N., Stoffel, M., Fournel, F., … De Franceschi, S. (2011). Observation of spin-selective tunneling in sige nanocrystals. Physical Review Letters. American Physical Society. https://doi.org/10.1103/PhysRevLett.107.246601
Katsaros, Georgios, Vitaly Golovach, Panayotis Spathis, Natalia Ares, Mathieu Stoffel, Frank Fournel, Oliver Schmidt, Leonid Glazman, and Silvano De Franceschi. “Observation of Spin-Selective Tunneling in Sige Nanocrystals.” Physical Review Letters. American Physical Society, 2011. https://doi.org/10.1103/PhysRevLett.107.246601.
G. Katsaros et al., “Observation of spin-selective tunneling in sige nanocrystals,” Physical Review Letters, vol. 107, no. 24. American Physical Society, 2011.
Katsaros G, Golovach V, Spathis P, Ares N, Stoffel M, Fournel F, Schmidt O, Glazman L, De Franceschi S. 2011. Observation of spin-selective tunneling in sige nanocrystals. Physical Review Letters. 107(24).
Katsaros, Georgios, et al. “Observation of Spin-Selective Tunneling in Sige Nanocrystals.” Physical Review Letters, vol. 107, no. 24, American Physical Society, 2011, doi:10.1103/PhysRevLett.107.246601.