Berlin 2005 – wissenschaftliches Programm
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HL: Halbleiterphysik
HL 3: Spintronik I
HL 3.3: Vortrag
Freitag, 4. März 2005, 11:15–11:30, TU P164
Spin-double refraction in two-dimensional electron gas — •Vincenzo Marigliano Ramaglia1, Dario Bercioux1,2, Vittorio Cataudella1, Giulio De Filippis1, and Carmine Antonio Perroni1 — 1Coherentia-INFM and “Federico II” University of Naples, I-80126, Italy — 2Institut für Theoretische Physik, Universität Regensburg, D-93040, Germany
Spin-double refraction [1] is observed in two-dimensional electron gas when electrons are injected with an angle out of normal on an interface separating a region without Rashba effect [2] from a region with it. The behavior of the electron spin in such scattering is analogous of the polarization of the light in a biaxial crystal.
This phenomenon can be used to realize a spin-field effect transistor [3] without ferromagnetic contact [4]. The source and the drain could be realized using n+-semiconductors. The main characteristic of this device is that, fixed the injection angle, above a critical value of the Rashba effect, the transmission and the polarization behave in the same oscillating way [4].
[1] V. Marigliano Ramaglia, D. Bercioux, V. Cataudella, G. De Filippis,A.C. Perroni and F. Ventriglia, Eur. Phys. J. B 36 365 (2003). [2] Yu A. Bychkov and E.I. Rashba, J. Phys. C: Solid State Phys. 17, 6039 (1984). [3] S. Datta and B. Das, Appl. Phys. Lett. 56, 665 (1990). [4] V. Marigliano Ramaglia, D. Bercioux, V. Cataudella, G. De Filippis and A.C. Perroni, cond-mat/0403534.