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← ScienceWhich mechanism generates increased resistance in strained piezo-resistive crystal?
A)Reduced electron mean free path length
B)Increased rate of electron-phonon scattering✓
C)Enhanced electron delocalization tendencies
D)Suppressed transverse optical phonon modes
💡 Explanation
Increased strain in a crystal lattice distorts the phonon spectrum, therefore *piezo-resistance* rises because *electron-phonon scattering* is enhanced, rather than decreased scattering, as higher frequency phonons dominate at constant temperature.
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