Large conduction band and Fermi velocity spin splitting due to Coulomb interactions in single-layer MoS2

Yago Ferreiros and Alberto Cortijo
Phys. Rev. B 90, 195426 – Published 19 November 2014

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 MoS2, 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 splitting found are in agreement with the optical absorption energies of the excitonic peaks A, B measured in the experiments.

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  • Received 19 March 2014
  • Revised 13 October 2014

DOI:https://doi.org/10.1103/PhysRevB.90.195426

©2014 American Physical Society

Authors & Affiliations

Yago Ferreiros* and Alberto Cortijo

  • Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, 28049 Madrid, Spain

  • *yago.ferreiros@csic.es
  • alberto.cortijo@csic.es

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Vol. 90, Iss. 19 — 15 November 2014

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