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← ScienceWhich consequence results when lattice strain modifies periodicity?
A)Band gap energy changes locally✓
B)Ferromagnetic domains become pinned
C)Superconductivity transition temperature increases
D)Photoelectric work function decreases
💡 Explanation
Lattice strain causes a change in interatomic spacing, and therefore modifies electron band energies, because the modified periodicity fundamentally shifts the band structure profile via Bloch's theorem; therefore, the band gap changes inhomogeneously, rather than affecting domains or superconductivity.
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