Poster (Scientific congresses and symposiums)
Spin-injection in a Ge-based thin film device : theoretical study of geometrical aspects
Fourneau, Emile; Avila Osses, Jonathan; Silhanek, Alejandro et al.
20181st Joint ISTDM / ICSI 2018 Conference
 

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Keywords :
Spintronics; Mn5Ge3; Comsol
Abstract :
[en] We present a two-dimensional (2D) model of spin injection/extraction from a ferromagnetic (FM) germanide Mn5Ge3 into Ge in a geometry similar to real devices. Our model addresses the challenges of describing current line distributions, barrier interface nonlinearity (thermionic emission and tunnel effect), the formation of a depletion region and the influence of the detection method (spin valves, Hanle precession). Results show the impact of confinement effects due to a scaling-down of injector electrode width, channel thickness and channel length. We highlight the importance of current crowding and depletion area on the spin injection ratio and spin lifetime and we determine the existence of an optimal current density for efficient spin-injection. Finally, we demonstrate that the spin diffusion length is impacted by current lines distribution and intensity, limiting the coherence of spin transport.
Research center :
Departement de Physique - Université de Liège
Disciplines :
Physics
Author, co-author :
Fourneau, Emile  ;  Université de Liège - ULiège > Département de physique > Physique des solides, interfaces et nanostructures
Avila Osses, Jonathan ;  Université de Liège - ULiège > Département de physique > Physique expérimentale des matériaux nanostructurés
Silhanek, Alejandro  ;  Université de Liège - ULiège > Département de physique > Physique expérimentale des matériaux nanostructurés
Nguyen, Ngoc Duy  ;  Université de Liège - ULiège > Département de physique > Physique des solides, interfaces et nanostructures
Language :
English
Title :
Spin-injection in a Ge-based thin film device : theoretical study of geometrical aspects
Alternative titles :
[fr] Injection d'un courant polarisé en spin dans un dispositif en Germanium : étude théorique des apsects géométriques
Publication date :
28 May 2018
Number of pages :
A0
Event name :
1st Joint ISTDM / ICSI 2018 Conference
Event organizer :
IHP (Innovations for High Performance) Microelectronics
Event place :
Potsdam, Germany
Event date :
du 27 mai 2018 au 31 mai 2018
Audience :
International
Name of the research project :
Quantum magnetic tweezers for manipulating charge and spin
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
ULiège - Université de Liège [BE]
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since 13 December 2017

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