[CP2K-user] [CP2K:21352] Reproducing NEGF results

Michael LaCount lacount.mi at gmail.com
Wed Apr 9 23:49:59 UTC 2025


I am trying to reproduce the transmission coefficient plot found in Figure 
4 of the CP2K Electron Transport based on Non-Equilibrium-Greens-Functions 
Method: eCSE 08-09 Technical Report (see attached). From what I can tell 
the system is the same as the one found 
in 'QS/regtest-negf-fft/au111_c6h4s2_gamma_0.50V.inp'. However when I run 
that job unmodified except to add print commands in the NEGF section (see 
below) I don't get anything close to what was found in the Technical 
Report. The job input and output files are attached.

I also have a further question regarding this test. I want to create I-V 
curves, from what I understand I should therefore use the zero bias 
transmission coefficients, and set NEGF/CONTACT/ELECTRIC_POTENTIAL to 0 
correct?

Any clarity on where I am going wrong would be appreciated. 

   &PRINT
     &DOS
       FILENAME device
       FROM_ENERGY -0.2
       N_GRIDPOINTS 401
       TILL_ENERGY 0.2
     &END DOS
     &TRANSMISSION
       FILENAME transm
       FROM_ENERGY -0.2
       N_GRIDPOINTS 401
       TILL_ENERGY 0.2
     &END TRANSMISSION
   &END PRINT

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