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Monolayer MoS2 : trigonal warping, "Γ-valley", and spin-orbit coupling effects

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2013

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Zólyomi, Viktor
Drummond, Neil D.
Rakyta, Péter
Fal'ko, Vladimir I.

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http://nbn-resolving.de/urn:nbn:de:bsz:352-247892
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http://arxiv.org/abs/1304.4084

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We use a combined ab-initio calculations and k.p theory based approach to derive a low-energy effective Hamiltonian for monolayer MoS2 at the K point of the Brillouin zone. It captures the features which are present in first-principles calculations but not explained by the theory of Xiao et al. [Phys Rev Lett 108, 196802 (2012)], namely the trigonal warping of the valence and conduction bands, the electron-hole symmetry breaking, and the spin-splitting of the conduction band. We also consider other points in the Brillouin zone which might be important for transport properties. Our findings lead to a more quantitative understanding of the properties of this material in the ballistic limit.

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530 Physik

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ISO 690KORMÁNYOS, Andor, Viktor ZÓLYOMI, Neil D. DRUMMOND, Péter RAKYTA, Guido BURKARD, Vladimir I. FAL'KO, 2013. Monolayer MoS2 : trigonal warping, "Γ-valley", and spin-orbit coupling effects
BibTex
@unpublished{Kormanyos2013Monol-24789,
  year={2013},
  title={Monolayer MoS2 : trigonal warping, "Γ-valley", and spin-orbit coupling effects},
  author={Kormányos, Andor and Zólyomi, Viktor and Drummond, Neil D. and Rakyta, Péter and Burkard, Guido and Fal'ko, Vladimir I.}
}
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