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A tight-binding model for MoS2 monolayers.

E Ridolfi1, D Le, T S Rahman

  • 1Instituto de Física, Universidade Federal Fluminense, 24210-346 Niterói, RJ, Brazil.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|August 26, 2015
PubMed
Summary
This summary is machine-generated.

We developed an accurate tight-binding model for molybdenum disulfide (MoS2) monolayers, crucial for understanding electronic properties. This method accurately predicts band structures and can be applied to other 2D materials.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Computational Chemistry

Background:

  • Molybdenum disulfide (MoS2) monolayers are key 2D materials with unique electronic properties.
  • Accurate theoretical models are needed to predict their band structure for device applications.

Purpose of the Study:

  • To develop a precise tight-binding parametrization for MoS2 monolayer band structure near the energy gap.
  • To provide a generalizable method for other transition metal dichalcogenides.
  • To incorporate spin-orbit coupling effects.

Main Methods:

  • Developed a generic derivation for band energy equations.
  • Created a tight-binding model parametrization including spin-orbit coupling.
  • Validated results against ab initio calculations.

Main Results:

  • The proposed model accurately reproduces orbital compositions.
  • The model correctly predicts the positions of valence and conduction bands.
  • The parametrization is validated by comparison with first-principles calculations.

Conclusions:

  • The developed tight-binding model offers an accurate description of MoS2 monolayer electronic structure.
  • This model serves as a foundation for large-scale atomistic electronic transport simulations.
  • The methodology can be extended to other 2D dichalcogenide materials.