barnali, send a ps or pdf file....of the band structure & name of compound. s.auluck
> Thank you sir for your kind response. My system is a metallic one where > the > Fermi energy sifted towards conduction band due to doping. For details > here > I am attaching the band structure. Do you think should I include drude > term? Kindly guide me to chose relaxation time for my system. > > I am waiting for your suggestion. > > Thanks in advance. > > Sincerely > Barnali > > > On Wed, Feb 17, 2016 at 6:02 PM, <saul...@iitk.ac.in> wrote: > >> barnali, >> drude term is to included only when a band/bands cut the fermi >> energy...for >> metals,semimetals......if you have an energy gap then you have only >> interband contributions..no drde term. >> s.auluck >> >> > Respected SIESTA users (Marty Blaber) >> > >> > I am calculating the optical properties of a graphene like 2D sheet >> > using >> > SIESTA 3.2. The band structure confirms its metallic nature and the >> > *.EPSIMG (was generated after optical calculation) shows W_p is >> non-zero, >> > i.e. W_p =0.0013. As I know that the drude term is to be included >> for >> > metal, now my queries are - >> > For calculating optical properties using optical.f should I include >> > drude term? >> > Is it necessary to include drude term for my system? If it is >> necessary, >> > then how can I choose relaxation time? I will be grateful if anyone >> > guide >> > me to choose relaxation time for graphene like 2D sheet? I am waiting >> for >> > any response. >> > >> > Thanks in advance. >> > >> > Sincerely >> > Barnali Bhattacharya >> > Ph.D. Student, >> > Assam University, Silchar, India >> > >> >> >> -- >> Prof. Sushil Auluck Phone:+91-512-6797092/6148 >> Department of Physics +91-512-6798177(Home) >> Indian Institute of Technology Cell :+91-9305548667 >> Kanpur 208016 (UP) Fax :+91-512-6790914 >> India E-mail:saul...@iitk.ac.in >> ...............................................:saul...@gmail.com >> http://www.iitk.ac.in/phy/People/phy_facvis.html >> http://www.iitk.ac.in/phy/New01/profile_SA.html >> http://www.iitk.ac.in/phy/index.php/people/faculty >> >> http://www.iitk.ac.in/phy/index.php/people/faculty/12-people/faculty/profile/88-sushil-auluck >> ....................................................................... >> ~ >> > -- Prof. Sushil Auluck Phone:+91-512-6797092/6148 Department of Physics +91-512-6798177(Home) Indian Institute of Technology Cell :+91-9305548667 Kanpur 208016 (UP) Fax :+91-512-6790914 India E-mail:saul...@iitk.ac.in ...............................................:saul...@gmail.com http://www.iitk.ac.in/phy/People/phy_facvis.html http://www.iitk.ac.in/phy/New01/profile_SA.html http://www.iitk.ac.in/phy/index.php/people/faculty http://www.iitk.ac.in/phy/index.php/people/faculty/12-people/faculty/profile/88-sushil-auluck ....................................................................... ~
