[Pw_forum] Calculating Tc from phonons

[dt331 at bath.ac.uk]

Dear All,

I am attempting to calculate the estimate of the superconducting Tc  
for LaFeAsO. I am not sure how to complete the last steps using  
matdyn.x and lambda.x. I am just using gamma as the only q-point while  
I test my methods.

After completing the SCF calculation I have successfully calculated  
the phonons with ph.x and input file:
phonons of LaFeAsO
  &inputph
!  recover=.true.,
   amass(1)=138.905,
   amass(2)=55.845,
   amass(3)=74.9216,
   amass(4)=15.9994,
   fildvscf='dvscf',
   electron_phonon='interpolated'
   tr2_ph=1.0d-20,
   ldisp=.true.,
   nq1=1, nq2=1, nq3=1 ! Just the gamma point to test the method
   prefix='GGAExpLatt_Ec40',
   outdir='./scratch/'
   fildyn='GGAExpLatt_Ec40.dyn',
  /

Then I ran q2r.x using the input:
  &input
   zasr='simple',  fildyn='GGAExpLatt_Ec40.dyn',  
flfrc='LaFeAsO_1x1x1.fc', la2F=.true.
  /

Then I ran matdyn.x with:
  &input
     asr='simple',
     flfrc='LaFeAsO_1x1x1.fc', flfrq='LaFeAsO_1x1x1.freq',  
la2F=.true.,dos=.true.
     fldos='phonon_1x1x1.dos', nk1=10, nk2=10, nk3=10, ndos=50
  /

Finally I attempted to fun lambda.x with the input:
10  0.02  0    ! emax, degauss, smearing method
     1          ! num q-points
     0.0000000  0.0000000  0.0000000   1.00 ! q-points from kpoints.x
elph.000
0.10                     ! \mu the Coloumb coefficient in the modified
                          ! Allen-Dynes formula for T_c (via \omega_log)

However, lambda.x fails with: "At line 78 of file lambda.f90 (unit =  
4, file = 'fort.4') Fortran runtime error: End of file".

Is this the correct method and input files to perform this calculation?

Many thanks,
David Tompsett.