deletions | additions       diff --git a/When_applied_an_electric_field__.tex b/When_applied_an_electric_field__.tex  index 871924d..5af92fe 100644  --- a/When_applied_an_electric_field__.tex  +++ b/When_applied_an_electric_field__.tex 
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When applied an electric field along the quasi-1D direction on CDW materials, nonlinear motion of CDW appears and nonlinear current and conductance can be observed \cite{Fleming_1979}. There are two problems of interest. (i) What is the conductance if applied a DC electric field? (ii) What is the frequency dependence of conductance for an AC electric field?