Impurities

Challenge/Objective:

• Can a single impurity donor wavefunction(wf) be experimentally mapped?

Approach:

• Indirectly probe wfs by measuring anisotropic hyperfine (AHF) tensor components.
• Use Si-29 as a single probe atom or a sample of probe atoms
• Calculate donor wfs in realistic geometries and electric fields
• Propose experiment: Distort wf by electric fields and interfaces
  => distort AHF
  => measure AHF based on lattice symmetries
  => map the wavefunction

Results/Impact:

• Demonstrated numerical stability of AHF calculation through semi-analytic comparison (toy wavefunctions)
• Demonstrated distortion of tight binding wavefunctions and toy wfs of different symmetries produce signature AHF maps.
• Preparing a full journal publications