4.10. FAQs

• Features and Functionalities
  • Can you recommend some reading material on the background of the NEGF method?
  • What is the difference between the “RealSpaceModes” and “EnergyEigenstates” in the output folder?
  • What are the meanings of “Check normalization of spectral function = …” and “Check normalization of lesser Green’s function = …” in the log file?
• Error Messages
  • nextnano.NEGF exit code: -…
• Problems and Limitations
  • How much memory do I need?
  • My results do not agree with experiment.
  • Why does the current density vary at different places? Current does not seem to be conserved.
  • In the gain spectra, the energy grid is not as expected from the input nn.NEGF_Gain{ dEPhot }/nn.NEGF_Gain{ dEPhotSelfConsistent }.

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Last update: 30/10/2024