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← ScienceWhich outcome occurs when electron's de Broglie wavelength approaches the size of a periodic crystal lattice?
A)Bragg diffraction, creating band gaps✓
B)Increased electron-phonon scattering
C)Reduced dielectric breakdown strength
D)Enhanced superparamagnetic behavior
💡 Explanation
When the electron wavelength is comparable to lattice spacing, Bragg diffraction occurs because coherent scattering from lattice planes interferes constructively, forming electronic band gaps. Therefore diffraction leads to band gaps instead of scattering, breakdown, or magnetism effects, which require different physical mechanisms.
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