Regensburg 2016 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 45: Spintronics (incl. Quantum Dynamics)
(Joint session of MA, HL and TT organized by MA)

TT 45.1: Vortrag

Mittwoch, 9. März 2016, 09:30–09:45, H32

Valley polarization in magnetically doped single-layer transition-metal dichalcogenides — •Udo Schwingenschlögl, Yingchun Cheng, and Qingyun Zhang — PSE Division, KAUST, Thuwal 23955, Saudi Arabia

We demonstrate that valley polarization can be induced and controlled in semiconducting single-layer transition-metal dichalcogenides by magnetic doping, which is important for spintronics, valleytronics, and photonics devices. As an example, we investigate Mn-doped MoS₂ by first-principles calculations. We study how the valley polarization depends on the strength of the spin orbit coupling and the exchange interaction and discuss how it can be controlled by magnetic doping. Valley polarization by magnetic doping is also expected for other honeycomb materials with strong spin orbit coupling and the absence of inversion symmetry. Reference: Phys. Rev. B 89, 155429 (2014).