Impurities and Thermal Conductivity in Metals
A physicist observes that when doped with impurity atoms, a pure metal’s thermal conductivity decreases significantly. Which microscopic explanation best accounts for this observation?
A
Impurity atoms disrupt the lattice, increasing phonon scattering
B
Impurities enhance free electron movement between atoms
C
Impurities increase the material’s heat capacity
D
Doping always increases atomic spacing uniformly
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