Holstein Model Dispersion.pdf

dcaholstein.pdf
Preview of Holstein Model Dispersion
🔗 Source: oro.open.ac.uk
📊 Size: 627 KB
📄 Pages: 16 pages
⬇️ Downloads: 75

Summary

The dynamical cluster approximation (DCA) is applied to the 2D Holstein model to calculate electron and phonon dispersions, incorporating vertex and non-local corrections. The results show that vertex corrections stabilize the solution, preventing a catastrophic softening of the (π, π) phonon mode. A kink in the electron dispersion is found along the (ζ, ζ) symmetry direction, corresponding to the renormalized phonon frequency at the (π, 0) point, accompanied by a sudden drop in the quasi-particle lifetime. Vertex and non-local corrections enhance the effects at large bare phonon frequencies.

Description

The dynamical cluster approximation (DCA) is applied to the 2D Holstein model to calculate electron and phonon dispersions, incorporating vertex and non-local...

Technical Information

  • File Format: PDF
  • File Size: 627 KB
  • Pages: 16
  • Language: EN
  • Total Downloads: 75
  • Last Updated: 8 hours ago

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