SDYSIGIS

Spin transport and dynamics in silicon-germanium islands

Coordinatore	COMMISSARIAT A L ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES    more  Organization address address: RUE LEBLANC 25 city: PARIS 15 postcode: 75015 contact info Titolo: Ms. Nome: Nathalie Cognome: Colombel Email: send email Telefono: +33 4 38 78 35 79 Fax: +33 4 38 78 51 53
Nazionalità Coordinatore	F codicestrano [F]
Totale costo	165˙145 €
EC contributo	165˙145 €
Programma	FP7-PEOPLE Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
Code Call	FP7-PEOPLE-2009-IEF
Funding Scheme	MC-IEF
Anno di inizio	2010
Periodo (anno-mese-giorno)	2010-04-02   -   2012-04-01

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	COMMISSARIAT A L ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES  Organization address address: RUE LEBLANC 25 city: PARIS 15 postcode: 75015 contact info Titolo: Ms. Nome: Nathalie Cognome: Colombel Email: send email Telefono: +33 4 38 78 35 79 Fax: +33 4 38 78 51 53	FR (PARIS 15)	coordinator	165˙145.60

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 Obiettivo del progetto (Objective)

'This project is centered on spin-dependent electronic transport and spin dynamics in self-assembled SiGe islands, directed at the development of semiconductor spintronic devices. In spite of its promising properties, SiGe remains a largely unexplored system for this purpose. The proposed project is further motivated and supported by an existing experience in the host group, which has recently succeeded in the realization of the first electronic devices based on individual SiGe quantum dots (QDs). Experimental effort will be first focused on the implementation of ferromagnetic (FM) contacts to the SiGe islands. Subsequently, low-temperature tunnel magnetoresistance (TMR) measurements will be performed as a function of the gate voltage and tunnel-coupling. The TMR response will provide important information concerning spin-injection efficiency and the impact of the Coulomb blockade phenomenon. Moreover, the effect of electric fields on the TMR response will be investigated, in order to identify signatures of Rashba spin-orbit interaction. To this end, dual-gate devices will be fabricated and their operation studied down to temperatures as low as 15 mK. Finally, the spin blockade regime will be exploited in order to explore the dynamics of single hole spins in SiGe islands. In particular, we aim to obtain important information on the characteristic time scales for spin relaxation and to perform coherent spin rotations by means of ac electric fields (via Rashba spin-orbit coupling). The proposed research project is also expected to create interesting opportunities for fundamental studies of exotic spin-related effects, resulting from the competition of ferromagnetic correlations, superconductivity, and Kondo effect.'