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Schwerpunktprogramm SPP 1285
Halbleiter Spintronik
Spintronik > Projekte > Projektansicht


Prof. Dr. Jürgen König

Fakultät für Physik
Universität Duisburg-Essen
Campus Duisburg
47048 Duisburg

Dr.-Ing. Michele Governale

Institut für Theoretische Physik III
Ruhr-Universität Bochum
44780 Bochum

Spin pumping through quantum dots

A substantial aspect of semiconductor spintronics is the controlled generation and manipulation of spin-polarized carriers in semiconductors. Both in the context of nanoscopic spintronic devices and quantum computation, one may go down to co- herently manipulate a few or even individual spins. The main objective of the present project is to theoretically analyze schemes for pumping spin through quan- tum dots. The appeal of such a scheme lies in the possibility to inject in a controlled way individual spins into a semiconductor, and manipulating them coherently. An important role will be played by interaction effects in the quantum dot. This in- cludes strong Coulomb interaction, that inevitably effects electronic transport in nanoscopic devices, as well as interactions with localized spins in the quantum dot. We plan to develop and apply theoretical tools for describing spin pumping through quantum dots and to find suitable pumping schemes for spintronic applications.


Wichtige Termine:

15. Sept. 2013:
Deadline für den Sonderband Semiconductor Spintronics (DFG-Abschlussbericht) in physica status solidi b
(nähere Informationen wurden per Email zugeschickt)

30. Sept. - 2. Okt. 2013:
Abschlusstreffen des Schwerpunktprogramms "International workshop on semiconductor spintronics" in der Residenz Würzburg
(nähere Informationen)

Aktuelle Veröffentlichung(en):

C. Drexler, S.A. Tarasenko, P. Olbrich, J. Karch, M. Hirmer, F. Müller, M. Gmitra, J. Fabian, R. Yakimova, S. Lara-Avila, S. Kubatkin, M. Wang, R. Vajtai, P. M. Ajayan, J. Kono, and S.D. Ganichev :  "Magnetic quantum ratchet effect in graphene" Nature Nanotechnology 8, 104 (2013)

J.H. Buß, J. Rudolph, S. Shvarkov, H. Hardtdegen, A.D. Wieck, and D. Hägele:  "Long electron spin coherence in ion‐implanted GaN: The role of localization" Appl. Phys. Lett. 102, 192102 (2013)

D.J. English, J. Hübner, P.S. Eldridge, D. Taylor, M. Henini, R.T. Harley, and M. Oestreich:  "Effect of symmetry reduction on the spin dynamics of (001)-oriented GaAs quantum wells" Phys. Rev. B 87, 075304 (2013)

V.L. Korenev, I.A. Akimov, S.V. Zaitsev, V.F. Sapega, L. Langer, D.R. Yakovlev, Yu. A. Danilov, and M. Bayer:  "Dynamic spin polarization by orientation-dependent separation in a ferromagnet–semiconductor hybrid" Nature Communications 3, 959 (2012)

M. Althammer, E.-M. Karrer-Müller, S.T.B. Goennenwein, M. Opel, R. Gross:  "Spin transport and spin dephasing in zinc oxide" Appl. Phys. Lett. 101, 082404 (2012)