[Pw_forum] Question about induced dipole moment

[Nicola Marzari]

lan haiping wrote:
> Thank you very much , Prof Marzari .
> Why can we safely treat metallic nanotubes with wfs' centers change  ?
> Just because of its feature DOS pattern at Fermi level ？
> 
> With Regards，
> Hai-Ping


I'd say because the system is not metallic in the tranverse direction.
But it's true that even in graphene one can use the WFs center to
reach meaningful conclusions about the contribution of the different
orbitals to the dielectric response - but let's not start a thread on
this.

			nicola


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Prof Nicola Marzari   Department of Materials Science and Engineering
13-5066   MIT   77 Massachusetts Avenue   Cambridge MA 02139-4307 USA
tel 617.4522758 fax 2586534 marzari at mit.edu http://quasiamore.mit.edu