EPW Forum

Dear roxana,

Thank you for the reply.
Are there experimental value of mustar [ ?*] for a material with which we can compare?
what should be the ideal criteria to take the input value of mustar [ ?*] for a material.
I work with ELK which have default value as 0.15.

topgun

Dear Roxana Margine,

While calculating superconducting transition temperature Tc, how do we give the value of mustar [ ?*].By ELIASHBERG-MIGDAL formalism.
It is usually said that it is kept between 0.15 and 0.10
But Can we go below 0.10 [?*<0.10] ?

Thanks in advance.

regards
topgun

thanks for the reply

top gun

Dear sir, In some codes like ELK, while calculating superconducting transition temperature, by supercell method , hundered of dynamic matrices are formed e.g in case of a AB3 material [with 4 atoms in unit cell ] 120 dynamic matrices were formed. does similar number of dynamical matrices are formed ...

can you please elaborate on supercell method and DFPT methods. i mean the difference between them? are calculations using supercell method more heavier than DFPT method? lastly, EPW have a feature for DFPT calculations and not supercell method.

topgun

Than you sir for the info.

TOPGUN

dear all,
We know one can use EPW in conjunction with QE. can it be used also with ABINIT.
how is ABINIT related to EPW.

topgun

Dear maam,

Thank you

TOPGUN

dear all,

Using Eliasberg Theory as given in the code, can we calculate transition temperatures for "weak coupling materials having ?<1". Is eliasberg theory valid for all conventional superconductors OR ONLY FOR STRONG COUPLING CONVENTIONAL SUPERCONDUCTORS.

top gun

THANK YOU MAAM