ELFT HÍRADÓ

[tcsaba <tcsaba AT eik.bme.hu>]

                 M E G H Í V Ó - I N V I T A T I O N

    Seminar Series of the Department of Theoretical Physics at the
           Budapest University of Technology and Economics


                            Vancsó Péter

      (Centre for Energy Research, Hungarian Academy of Sciences)


         Novel spintronic device concept based on the magnetic
                   edge state in graphene nanoribbons

Graphene nanoribbons (GNRs) have been proposed as potential building 
blocks for field effect transistor (FET). In this seminar, we present a 
novel zigzag GNR device concept, enabling the control of both charge and 
spin signals, integrated within the simplest three-terminal device 
configuration. Using an experimentally validated theoretical model [1], 
we show that the applied gate voltage can dynamically open and close an 
interaction gap due to the strong interplay between the band structure 
and edge spin configuration. These transistors can switch at low 
voltages and high speed up to 50% spin polarization of the current by 
using the same back gate electrode [2]. Besides the graphene, in this 
seminar we will also discuss the edge spin properties of molybdenum 
disulfide (MoS2) another two-dimensional material.

[1] G. Zs. Magda, X. Jin, I. Hagymási et al., Nature 514, 608-611 (2014)
[2] P. Vancsó, I. Hagymási, L. Tapasztó, 2D Materials 4, 024008 (2017)


Időpont: 2018. március 23. péntek, 10:15
Helyszín: BME Fizikai Intézet, Elméleti Fizika Tanszék,
Budafoki út 8. F-épület, III lépcsőház, szemináriumi szoba