next up previous index
Next: Problem: Thermal Conductivity Up: Transport Properties Previous: Problem: Anisotropic Layer

Problem: Two-Charge-Carrier Drude Model

   Consider a system of two types of charge carriers in the Drude model. The two carriers have the same density (n) and opposite charge (e and -e), and their masses and relaxation rates are tex2html_wrap_inline6583 and tex2html_wrap_inline6585 , respectively. (You may want to use the mobility, tex2html_wrap_inline6587 , instead of tex2html_wrap_inline6589 and m.)

(a)   Calculate the magnetoresistance, tex2html_wrap_inline6593 , where H is the magnetic field.

(b)   Calculate the Hall coefficient.

(c)   In an undoped semiconductor, tex2html_wrap_inline6597 describes the temperature dependence of the carrier concentration. What will the temperature dependence of the magnetoresistance and the Hall coefficient be?

 

This document can be accessed on the World Wide Web at "http//:solidstate.physics.sunysb.edu/book/prob/ ".

Laszlo Mihaly
Thu Oct 31 13:23:11 EST 1996

Back to the Small cover of the book Cover Page .