A graph has a vertical axis, E, and horizontal axis, k sub x. A T valley is represented by an upward opening parabola with an apex at the origin. A second upward opening parabola representing an X valley is plotted above and to the right of it in quadrant 1. An electron is plotted on the right, rising portion of each curve at distance E sub 0 from the apex.

Get Solid State Electronic Devices, 7th Edition now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.