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Schwerpunktprogramm SPP 1285
Halbleiter Spintronik
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Projekt

Ansprechpartner1
Dr. M. Wenderoth
Adresse1
IV. Physikalisches Institut
Georg-August Universität Göttingen
Friedrich-Hund-Platz 1
37077 Göttingen, GERMANY

Tel.:
Tel.:+49 551 39-9367
Fax:
Fax:+49 551 39-4560
Ansprechpartner2
Prof. Dr. Rainer G. Ulbrich
Adresse2
IV. Physikalisches Institut
Georg-August Universität Göttingen
Friedrich-Hund-Platz 1
37077 Göttingen, GERMANY

Tel.:
Tel.:+49 551 39-4541
Fax:
Fax:+49 551 39-4560
Projekttitel
Electrical Transport Involving Evanescent States in III-V Semiconductors: The Role of Spin-Orbit-Coupling
Projektbeschreibung

We propose to study the effect of spin-orbit-coupling on evanescent states concomitant with semiconductor interfaces and surfaces. Its influence on spin transport of charge carriers through tunneling channels will be investigated. For semiconductor systems this issue has only recently been addressed theoretically. Bloch states with real wave vectors and energies close to the band edges have energy splittings which are - in general - relatively small. It came as a surprise that these effects are greatly enhanced when complex k-vectors are considered. We have shown experimentally that resonant enhancement of the tunnel current by a dopant atom allows to study the evanescent states on the nanometer scale and may be utilized as an efficient spin filter.

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)