SPAJORANA

Towards spin qubits and Majorana fermions in Germanium self-assembled hut-wires

Coordinatore	UNIVERSITAT LINZ    more Spiacenti, non ci sono informazioni su questo coordinatore. Contattare Fabio per maggiori infomrazioni, grazie.
Nazionalità Coordinatore	Austria [AT]
Totale costo	1˙675˙020 €
EC contributo	1˙675˙020 €
Programma	FP7-IDEAS-ERC Specific programme: "Ideas" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
Code Call	ERC-2013-StG
Funding Scheme	ERC-SG
Anno di inizio	2014
Periodo (anno-mese-giorno)	2014-01-01   -   2018-12-31

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	UNIVERSITAT LINZ  Organization address address: ALTENBERGERSTRASSE 69 city: LINZ postcode: 4040 contact info Titolo: Dr. Nome: Georgios Cognome: Katsaros Email: send email Telefono: +43 732 24689603 Fax: +43 732 24689603	AT (LINZ)	hostInstitution	1˙675˙020.00
2	UNIVERSITAT LINZ  Organization address address: ALTENBERGERSTRASSE 69 city: LINZ postcode: 4040 contact info Titolo: Mrs. Nome: Susanne Cognome: Schwind Email: send email Telefono: +43 732 2468 9600 Fax: +43 732 2468 8650	AT (LINZ)	hostInstitution	1˙675˙020.00

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 Obiettivo del progetto (Objective)

'A renewed interest in Ge has been sparked by the prospects of exploiting its lower effective mass and higher hole mobility to improve the performance of transistors. Ge emerges also as a promising material in the field of spin qubits, as its coherence times are expected to be very long. Finally, it has been proposed that strained Ge nanowires show an unusually large spin orbit interaction, making them thus suitable for the realization of Majorana fermions. In view of these facts, one is able to envision a new era of Ge in information technology. The growth of Ge nanocrystals on Si was reported for the first time in 1990. This created great expectations that such structures could provide a valid route towards innovative, scalable and CMOS-compatible nanodevices. Two decades later the PI was able to realize the first devices based on such structures. His results show that Ge self-assembled quantum dots display a unique combination of electronic properties, i.e. low hyperfine interaction, strong and tunable spin-orbit coupling and spin selective tunneling. In 2012, the PI’s group went a step further and realized for the first time Ge nanowires monolithically integrated on Si substrates, which will allow the PI to move towards double quantum dots and Majorana fermions. In view of their exceptionally small cross section, these Ge wires hold promise for the realization of hole systems with exotic properties. Within this project, these new wires will be investigated, both as spin as well as topological qubits. The objective of the present proposal is mainly to: a) study spin-injection by means of normal and superconducting contacts, b) study the characteristic time scales for spin dynamics and move towards electrical spin manipulation of holes, c) observe Majorana fermions in a p-type system. The PI’s vision is to couple spin and topological qubits in one “technological platform” enabling thus the coherent transfer of quantum information between them.'