Hello all,
given the longitudinal and transverse effective masses, ml and mt, respectively, of a charge carrier in a semiconductor, the relation for determining the effective mass as a function of theta is:
m*(theta)=ml*mt2/(ml cos2(theta)+mt sin2(theta))
Now, substituting theta =0 gives the mt indeed, but substituting theta =pi/2 does not give ml, but rather gives the product ml mt. What is the value of theta corresponding to the longitudinal effective mass??
This equation is in Kittel, Introduction to Solid state physics.
Also it is in the attached reference.
Article Determination of the Electron Masses in Stannic Oxide by Sub...
Thank you all,
Ahmed
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