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← ScienceWhich mechanism causes increasing electrical resistance in a semi-metal under strain?
A)Decreased electron mean free path✓
B)Increased phonon-phonon scattering
C)Increased Fermi level broadening
D)Reduced lattice defect formation
💡 Explanation
Decreased electron mean free path occurs because strain increases disorder in the crystal lattice of a semimetal, reducing average distance electrons travel before scattering. Therefore, resistance increases, rather than decreasing via increased defect formation.
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