Eurocores_EuroGRAPHENE_Graphene-based systems for spintronics (SPINGRAPH)

01.09.2010 - 28.02.2014
Forschungsförderungsprojekt
EUROCORES/EuroGRAPHENE DFT studies of magnetic graphene/3d-metal interfaces An individul contribution to the Collaborative Research Project Graphene-based systems for spintronics: Magnetic interactions at the graphene/3d-metal interface. Abstract: Spintronics, or spin electronics, refers to the study of the role played by the electron spin in solid state physics, and the development of possible devices that specifically exploit spin properties instead of (or in addition to) charge degrees of freedom A special role in spintronics may be played by graphene, a single layer of hexagonally ordered carbon, with intriguing and unique properties, which is probably the best possible material for the realization of a metal-based transistor. Experimentally, graphene will be grown on top of Ni(111), Co(0001), and SiC(0001) substrates. Within the research consortium a range of well-established complementary experimental techniques is available in their groups to investigate electronic and magnetic properties of graphene-based systems such as scanning tunneling microscopy (STM), electron diffraction, angle- and spin-resolved photoemission as well as scanning tunneling spectroscopy (STS) using magnetic tips. The experimental investigations are augmented by the efforts of the present theory group, which has a strong scientific background in the determination of the geometrical structure, electronic structure and materials properties of the bulk, surfaces and interfaces of magnetic and non-magnetic materials using advanced highly precise DFT program packages developed in Vienna. The three central goals of the theory project are: (1) To perform high quality DFT calculations of the spin-polarized electronic structure of mono and bilayers of graphene on and between Ni(111) and Co(111) surfaces at the corresponding optimal geometries and to use these results in post-DFT (GW) steps to calculate realistic quasi particle energies for the graphene bands. (2) To model small graphene islands and narrow stripes on Ni(111) as well as small one and two layers thick Ni islands and narrow stripes on graphene/Ni(111), paying particular emphasis to edge states and their magnetic behavior. (3) To study the electronic transport (conductivity) of suitably chosen graphene/Ni(111) model systems parallel and perpendicular to graphene layers in contact with a magnetic Ni surface, with particular emphasis on an expected spin filtering due to spin-dependent electronic transport.

Personen

Projektleiter_in

Projektmitarbeiter_innen

Institut

Grant funds

  • FWF - Österr. Wissenschaftsfonds (National) Austrian Science Fund (FWF)

Forschungsschwerpunkte

  • Computational Materials Science: 100%

Schlagwörter

DeutschEnglisch
DFTDFT
GraphenGraphene
MagnetismusMagnetism
Grenzflächeinterface
ÜbergangsmetallTransition Metal

Publikationen