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← ScienceWhich consequence results when crystalline silicon compressive stress?
A)Band gap energy magnitude decreases✓
B)Free carrier mobility increases
C)Thermal conductivity proportionally reduces
D)Intrinsic carrier concentration increases
💡 Explanation
Compressive stress modifies the interatomic spacing of silicon's crystal lattice, changing the band structure through deformation potential. This modifies the energy gap via band gap narrowing, because the smaller spacing increases orbital overlap, therefore the band gap diminishes, rather than the other parameters being influenced.
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