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Yen-Lin Chen edited When_applied_an_electric_field__.tex
over 8 years ago
Commit id: 28c4a3d481918ac848f0648473c0df8080fa9626
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diff --git a/When_applied_an_electric_field__.tex b/When_applied_an_electric_field__.tex
index 8ce9b96..c69c7ff 100644
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The probability comes in the right hand side of equation (5), reducing the force felt by CDW by a fraction of P. The weak electric field, i.e. $E_0 >> E$ leads to vanishing of the force. Thus the conductance is negligible. For large field $E >> E_0$, the force is nonlinearly dependent upon E, thus the second term in equation (4) shows up. Moreover, $E_0$ depends upon the gap energy; therefore, the relationship between the lattice spacing and the threshold electric field will also be investigated.
Secondly, this project will investigate the relationship between the AC conductance and the frequency of applied field. This problem was dealt with by considering the classical single particle model. For
very high or very low frequency, the AC conductance vanishes since CDW is overdamped. The AC conductance plays an important role if the frequency is near the frequency of CDW. In this case from equation (1)
\begin{equation}
\omega_0 = 2k_F v
\end{equation}