Re: [Pw_forum] carrier lifetime, diffusion length, mobility

2017-02-15 Thread HASSAN AHMOUM
Dear Abdullah Yes you can calculate indirectly all this parameter's by using Boltztrap code. Boltztrap give you as output file ( carrier concentration, conductivity/carrier lifetime) so by using this equation [1] you can calculate carrier lifetime [1]:K.P.Ong, D.J.Singh, P.Wu, Phys. Rev. B 83

Re: [Pw_forum] <caaev5eu3xt2f8a+xjjwmwb-glst-ay1wwmfi0zsro9sfvtq...@mail.gmail.com>

2017-01-15 Thread HASSAN AHMOUM
Dear Dario yes i have a good reason to change pseudopotentials, because epsilon.x give me this message when i used ULTRASOFT pseudopotential *"USPP are not implemented" *, then i changed type of pseudopotential to norme-conserving to calculat optical properties.

[Pw_forum] Help

2017-01-14 Thread HASSAN AHMOUM
Dear users, I did a study on the crystallin electronics and thermoelectric and magnetic properties using ultrasoft pseudopotential and for the optical properties I used norme-conserving pseudopotential, my question now is: do I have the right to publish all these results knowing that I changed

[Pw_forum] Change of phase

2016-12-30 Thread HASSAN AHMOUM
Dear all, can we use QUANTUM-espresso in order to study the phase change (cristallin structural) of a material with versus temperature and without changing of pressure? i remember someone ask same question this is 6 or 5 month ago!! but i did't found he's poster. Thanks in advance.