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Schwerpunktprogramm SPP 1285
Halbleiter Spintronik
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Projekt

Ansprechpartner1
Prof. Dr. Dirk Grundler
Adresse1

Technische Universität München
Physik Department E 10
James-Franck-Str. 1
85748 Garching

Tel.:
Tel.:089 / 289 12401
Fax:
Fax:089 / 289 12414
Ansprechpartner2
Dr. Marc Wilde
Adresse2

Technische Universität München
Physik Department E 10
James-Franck-Str. 1
85748 Garching

Tel.:
Tel.:089 / 289 12420
Fax:
Fax:089 / 289 12414
email:
Projekttitel
Strain engineered and field-effect controlled spin-orbit interaction in semiconductor nanostructures: Magnetization and spin transport
Projektbeschreibung

The aim of this project is to investigate and to engineer spin-orbit interaction and zerofield spin splitting in nanostructured III-V semiconductor heterostructures: (i) Using micromechanical cantilevers we will measure spin and orbital magnetization of twodimensional electron systems, quantum wires and quantum dots exhibiting zero-field spin splitting. The de Haas-van Alphen effect at low temperature directly reflects the ground state energy and allows us to quantitatively compare to band structure calculations on spin-orbit interaction and g factors. (ii) We will study spin transport in engineered semiconductor devices where we vary the spin-orbit interaction and g factor by electrical means and tunable strain. In particular we will realize double-sided field-effect electrodes using atomic layer deposition and "on-chip" stressors using piezoelectricity and micromechanics. Based on strain-engineered and field-effect controlled heterostructures we propose to investigate spin-selective reflection at a device boundary, generation of spin-polarized currents without magnetic leads and spin-selective charge focusing in a multi-terminal device.

Zurück

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)