Exercises 10.5: Anisotropy

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10.4.1 On the left is the reciprocal space display for electrons in an anisotropic band. A field has been applied with equal x- and y-components. The graph shows x- and y-components of the average velocity of the electron distribution.

A) Which color is the x-component and which color is the y-component?

B) Will this material have a higher electrical conductivity if measured in the x- or in the y-directions?