Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MA: Fachverband Magnetismus

MA 15: Poster I

MA 15.41: Poster

Dienstag, 18. März 2025, 10:00–12:30, P1

First principle study of Spin and charge transport properties in CrO2/CrI3/Td-WTe2/CrO2 based device heterostructures — •Nivedita Pandey and Oscar Granas — Department of Physics and Astronomy, Uppsala University, SE-751 20 Uppsala, Sweden

Van der Waals heterostructures are attractive for spintronic applications due to tunability of electronic, and magnetic properties. Herein, we show that precise control over spin injection and filtering can be achieved by interfacing magnetic and non-magnetic 2D layers, and these properties are robust to electrode attachment. We study a bilayer of CrI3/WTe2, using electrode CrO2 to design a promising spintronic device. We use density functional theory, capturing charge transport and thermal properties through the use of the non-equilibrium Green function. Integration of ferromagnetic CrI3 with either metallic or semiconducting phase of WTe2 results in substantially different properties of the interface. Further, the coupling between magnetism, and charge/spin transport has been studied in detail for both parallel magnetization and anti-parallel magnetization case. The spin polarized current with variation in the electrode temperature has been calculated for the designed CrO2/CrI3/WTe2/CrO2 device, further the spin filtration efficiency is extracted to understand the effect of temperature on spin filtration. The proposed device shows a spin filtration efficiency of around 100% at the studied temperatures. In addition, a high thermal magnetoresistance has been obtained for the designed device.

Keywords: Spincaloritronics; Density functional theory; Van der Waal heterostructure; Spin filtration efficiency; Magnetoresistance