Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 27: Spintronics (incl. Quantum Dynamics)

MA 27.2: Vortrag

Dienstag, 21. März 2017, 14:15–14:30, HSZ 301

Ising spintronics in transition-metal dichalcognides — •Bin Shao1, Malte Schüler1,2, Gunnar Schönhoff1,2, Thomas Frauenheim1, Gerd Czycholl2, and Tim Wehling1,21Bremen Center for Computational Materials Science, Universität Bremen, Am Fallturm 1a, 28359 Bremen, Germany — 2Institut für Theoretische Physik, Universität Bremen, Otto-Hahn-Allee 1, 28359 Bremen, Germany

The orbital character of charge carriers at the Fermi level of transition-metal dichalcognides, MX2 (M= Mo, W; X= S, Se, Te), can be selected via doping levels, leading to orbital dependent spin-flip scatterings with magnetic adatoms on MX2. By utilizing this feature, we propose a mechanism for Ising spintronics relying on the tunability of spin lifetime of transition-metal adatoms with d9 configuration on a MX2 monolayer. The spin lifetime can be tuned by more than two orders by shifting the Fermi level only slightly. Moreover, the system exhibits a sizable magnetic anisotropy. We calculate the spin lifetime and magnetic anisotropy of magnetic adatoms based on an effective model Hamiltonian, reveling their connections to doping levels and the symmetry of adsorption sites straightforwardly. Our ab initio calculations suggest that this Ising-type spintronics should be realizable in Co, Rh, or Ir adatoms on MoS2.

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