Yaohua Tan

Tight Binding parameterization of superlattices

Motivation:

  • To have transferable TB parameters are critical for device level simulations(interfaces always exists).
    • existing TB model has ambiguities at interfaces
    • Transferability of existing TB model are questionable

Approach:

  • sp3d5s* TB model.
  • TB parameters are obtained by ab-initio mapping
  • environment dependent TB model for strained materials

Results:

  • Transferability of TB parameters to on both strained bulk and superlattices.

Impact:

  • Transferable TB model with nearest neighbor couplings can be achieved.