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← ScienceWhich outcome occurs when substitutional impurities alter doping lattice?
A)Fermi level shifts in band✓
B)Increased electron-phonon energy coupling
C)Debye temperature undergoes minor decrease
D)Intrinsic carrier densities increase rapidly
💡 Explanation
The Fermi level shifts because substitutional impurities introduce extra charge carriers; this process is called doping, thereby altering electronic band structure rather than phonon behaviour, therefore impacting coupling or intrinsic thermal behavior.
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