Impurities

Hyperfine Stark Effect

Single Impurity Electronics Hyperfine Stark Effect of P-Impurities Rajib Rahman, Seung Hyun Park, Gerhard Klimeck

Objective:

  • Study Stark Shift of hyperfine coupling
  • Compare with experiment, BMB & EMT
  • Investigate interface effects for realistic systems
  • Establish the physics of quadratic and linear Stark coefficients

Approach:

  • Use 3.5 M atomistic domain with single P impurity in NEMO 3D under realistic BCs & E-fields
  • TB approach optimized for P donors
  • Vary impurity depth from interface
  • Solve the 20 band spin Hamiltonian by parallel Lanczos algorithm

Results/Impact:

  • Quadratic Stark coefficient from TB, BMB & experiment agree well
  • EMT estimate differs by an order of magnitude
  • Proximity of impurity to interface produces significant linear Stark effect


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Impurities

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