Motion of Electrons and Holes in Perturbed Periodic Fields
نویسندگان
چکیده
time axis could be detected. Hence, one concludes that if the deformation introduced changes in the elastic constants C33 or C44 these changes must be less than one or two percent for strains up to 10—' radian. Such a result is to be expected since the appearance of slip bands on the surface indicates that the deformation was confined to numerous very narrow bands. Within these bands one might expect very diGerent elastic modulii but since their total thickness is small compared to the total thickness of undisturbed crystal, the sound wave spends most of its time traveling in an undeformed lattice. The author is particularly indebted to Professor E. P. T. Tynda11 for his encouragement and valuable suggestions throughout the development and performance of this experiment.
منابع مشابه
The Theory of Everything
Properties of Solids and liquids 10 single electron approximation 10 Properties of the free electron model 10 Periodic potentials 11 Kronig-Penney model 11 Tight binging approximation 12 Combining Bloch’s theorem with the tight binding approximation 13 Weak potential approximation 14 Localization 14 Electronic properties due to periodic potential 15 Density of states 15 Average velocity 15 Resp...
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