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← ScienceWhich outcome arises when thermal vibration exceeds band-gap energy?
A)Semiconductor loses carrier confinement entirely✓
B)Increased piezoelectric voltage coefficient
C)Superconducting transition temperature increases
D)Ferromagnetic material's Curie temperature rises
💡 Explanation
Increased vibrations permit many electrons to jump across the **band gap**. Because increased numbers of carriers exist in the material's conduction band, the semiconductor's carrier confinement lowers; therefore the semiconductor conducts, rather than it remaining insulating at higher confinement from quantum effects in the material's crystalline structure band.
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