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How should I calculate lattice thermal conductivity in Quantum ESPRESSO? I have installed phonopy. My Linux distribution is Ubuntu.

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    $\begingroup$ I'm kind of new to this, but from what I've read you might need to use the ShengBTE code along with QE in order to find the lattice thermal conductivity. $\endgroup$ Jul 19, 2021 at 19:25
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    $\begingroup$ @AnoopANair yes. That’s what I will be trying to solve this. If I get it done successfully, I will post the steps here after as answer to this problem. $\endgroup$ Jul 20, 2021 at 5:19
  • $\begingroup$ @epsilon02fft Did you have any luck? $\endgroup$ Aug 24, 2021 at 0:47
  • $\begingroup$ @NikeDattani Yes I did. I was successful in performing phonopy and phono3py calculations for Si. The codes ran successfully, but I am facing further problems of mpirun and RAM limitations about which I will post soon. Apologies for not responding before, couldn’t login to my account and also got busy with uni official work. $\endgroup$ Nov 21, 2021 at 10:23

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Some years ago I found the following steps in ResearchGate: You need:

  • First, you need to create a QE input file (pwscf), using ibrav=0, lattice vectors in bohr units, atomic coordinates in crystal units.
  • Using the input file, run phono3py/third_order.py to create supercell within finite displacement method.
  • Then you need to write a script that will copy all header option, specially &control and &system to each supercell file and rename to scf.in and generate sequential folder namely, disp-00001..., ect.
  • Now run pwscf for each supercell and please do not forget to select force calculation in pwscf input file.
  • After this step you need to run phono3py to calculate second order (harmonic) and third order (anharmonic) force constants.
  • Finally, run phono3py to calculate lattice thermal conductivity using dense q-point grid and primitive cell.
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    $\begingroup$ Thank you sir for your reply. I was successful to run these codes. Now I am working to solve ShengBTE code and the problem I am facing of mpirun which is occurring in 3rd step above (as your wrote) $\endgroup$ Nov 21, 2021 at 10:25

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