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Coupling Between Electronic and Phononic Degrees of Freedom in 8 – Pmmn Borophene

Mohammadghorban Rayat, Ali | 2023

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 56417 (04)
  4. University: Sharif University of Technology
  5. Department: Physics
  6. Advisor(s): Jafari, Akbar
  7. Abstract:
  8. 8−Pmmn Borophene is a single layer 2D material made or Boron atoms. This material is a Dirac material with anisotropic tilted Dirac cones (Unlike Graphene). In study, We will exploit Group theory and representation theory to investigate the space group of this material namely Pmmn space group. Then representation theory and basis functions of the irreducible representations of space group will be used to find the allowed couplings between electronic and phononic states; hence we will derive the most general hamiltonian of Electron-Phonon coupling allowed by symmetry
  9. Keywords:
  10. Group Theory ; Electron-Phonon Coupling ; Dirac Materials ; Irreducible Representation ; 8-Pmmn Borophene ; Irreducible Representation

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