ECE Purdue Semiconductor Fundamentals L1.5: Materials Properties - Free Carriers in Semiconductor

This video is part of the course "Semiconductor Fundamentals" taught by Mark Lundstrom at Purdue University. The course can be found on nanoHUB.org at nanohub.org/courses/sfun or on edX at www.edx.org/course/semiconduc... .
This course provides the essential foundations required to understand the operation of semiconductor devices such as transistors, diodes, solar cells, light-emitting devices, and more. The material will primarily appeal to electrical engineering students whose interests are in applications of semiconductor devices in circuits and systems. The treatment is physical and intuitive, and not heavily mathematical.
Technology users will gain an understanding of the semiconductor physics that is the basis for devices. Semiconductor technology developers may find it a useful starting point for diving deeper into condensed matter physics, statistical mechanics, thermodynamics, and materials science. The course presents an electrical engineering perspective on semiconductors, but those in other fields may find it a useful introduction to the approach that has guided the development of semiconductor technology for the past 50+ years.

[@user-il6ke6dl3q]

[@bogdansofalca6946]

Dear professor, At min 8:00 we have hbar=h/2pi and wavenumber k=2pi/landa , if we substitute both into momentum formula don't we get p=h/landa ? Isn't this not the energy formula . Surely there is something that I am missing. Thank you in advance!

[@karthik84832]

That's not the formula for energy , p=h/lambda is momentum of a particle(electron), described by debroglie showing the connection between particle and waves.

[@suprabhatbhagavathula5675]

Energy is h x c / lambda (which is equal to h x mu (mu is frequency). That's why h / lambda is momentum, not energy.