Large conduction band and Fermi velocity spin splittings due to Coulomb interactions in single-layer MoS_{2}

Abstract

We study the effect of Coulomb interactions on the low energy band structure of single-layer transition metal dichalcogenide semiconductors using an effective low energy model. We show how a large conduction band spin splitting and a spin dependent Fermi velocity are generated in MoS${}_2$, as a consequence of the difference between the gaps of the two spin projections induced by the spin-orbit interaction. The conduction band and Fermi velocity spin splittings found are in agreement with the optical absorption energies of the excitonic peaks A, B measured in the experiments.

arXiv commentRevised version, as published in PRB

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Cited by in corpus (9)

• k.p theory for two-dimensional transition metal dichalcogenide semiconductors
• Giant spin-splitting and gap renormalization driven by trions in single-layer WS${}_2$/h-BN heterostructures
• A tight-binding model for MoS${}_2$ monolayers
• Excitons and trions in monolayer transition metal dichalcogenides: A comparative study between the multiband model and the quadratic single-band model
• Excitons, trions, and biexcitons in transition metal dichalcogenides: magnetic field dependence
• Strong Valley Zeeman Effect of Dark Excitons in Monolayer Transition Metal Dichalcogenides in a Tilted Magnetic Field
• Spatial control of carrier capture in two-dimensional materials: Beyond energy selection rules
• Charge compressibility and quantum magnetic phase transition in MoS${}_2$
• Fine structure of negatively charged and neutral excitons in monolayer MoS${}_2$