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Unformatted text preview: e x × e y ik y
ik x
c) ψ ( r ) = sin ( 2π z / t ) e x × e y ik y
ik x
d) ψ ( r ) = cos (π z / t ) e x × e y ik y
ik x
e) ψ ( r ) = cos ( 2π z / t ) e x × e y 1 5) What is a “quasi electric field” for electrons? a) A quantity that exerts a force on electrons due to variations in electron affinity b) A quantity that exerts a force on electrons due to variations in bandgap c) A quantity that exerts a force on electrons due to variations in effective mass d) A quantity that exerts a force on electrons due to variations in the density of states e) A quantity that exerts a force on electrons and that is obtained by solving the Poisson equation. Lecture 3 Quiz: 1) Which of the following is true about the density of states in k space? a) It depends on the dimens...
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 Fall '14

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