Physics · Solid State Physics
For a crystal, let φ denote the energy required to create a pair of vacancy and interstitial defects (Frenkel defect). If n pairs of such defects are formed, and n << N, N', where N and N' are, respectively, the total number of lattice and interstitial sites, then n is approximately:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 11 2 (N + N') e −φ / (k B T)
- 21 2 (N + N') e −φ / (2k B T)
- 3√(NN') e −φ / (k B T)
- 4√(NN') e −φ / (2k B T)✓
Correct answer
√(NN') e −φ / (2k B T)
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