How to examine the optical spectra

[Sumit2506]

In the optical spectra of the (5,5) CNT i am getting the three curves corresponding to 3 different diagonal component of the Exx, Eyy and Ezz, which one is significant, or how to calculate dielectric constant from these curves.




Thanks

[zh]

The significant component depends on the tube axis chosen in your calculations. For example, if you choose the tube axis along the x direction,  the significant component will be the Exx.

For the second question, please refer to the manual: http://www.quantumwise.com/documents/manuals/latest/ReferenceManual/index.html/ref.opticalspectrum.html.