neu
Apr20-07, 04:31 PM
1. The problem statement, all variables and given/known data
I just want to clear this up, im a little confused:
when an electric field is applied there is a force on the electron K-states thus displacing the fermi surface/sphere
Is the relaxation time ( \tau)= lifetime of fermi sphere displacement
or is lifetime of displacement= reciprocal relaxation time
both are labebel as \tau in my notes and related as below but how can they be the same?
2. Relevant equations
\sigma = \frac{n e^2 \tau}{m} electrical conductivity
\rho = \frac{1}{\sigma}=\frac{m}{n e^2 \tau} electrical resistivity
I just want to clear this up, im a little confused:
when an electric field is applied there is a force on the electron K-states thus displacing the fermi surface/sphere
Is the relaxation time ( \tau)= lifetime of fermi sphere displacement
or is lifetime of displacement= reciprocal relaxation time
both are labebel as \tau in my notes and related as below but how can they be the same?
2. Relevant equations
\sigma = \frac{n e^2 \tau}{m} electrical conductivity
\rho = \frac{1}{\sigma}=\frac{m}{n e^2 \tau} electrical resistivity