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Ab initio Calculations Using Elk Code

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Large positive linearization energy

 

Andrew Shyichuk - 2019-08-28

Dear Users,

In some of my calculations, I get a large positive linearization energy for a certain local orbital of a certain specie, something like 1-1.5 Ha . Assuming that linearization energies and Fermi energy are on the same scale, this puts my local orbital way above Fermi energy (which is about 0.3-0.4 Ha).
The same specie manifests quite a low occupation of MT sphere, at least several electrons short.

Does linengy above Fermi level makes the respective LO unoccupied, effectively messing up my calculation?

I did not check yet, but is this going to manifest as ghost bands, or at least as a non-trustworthy DOS?
I am positive that wrong linengies and occupations are bad.

Thank you.
Andrew

 

  • Last edit: Andrew Shyichuk 2019-08-28

  • J. K. Dewhurst

    J. K. Dewhurst - 2019-08-28

    Hi Andrew,

    Are you running with highq=.true. or lorbcnd=.true.?

    Regards,
    Kay.

     

  • Andrew Shyichuk

    Andrew Shyichuk - 2019-08-28

    Dear Kay,

    No, and no. These were regular calculations.
    The orbital was supposed to be 5p of Ta. Come to think of it, I must have specified a too large linengy value in the specie file.

    Also, lorbcnd is a neatest feature, I sure am going to use it.

    Best regrads.
    Andrew

     

  • Anonymous

    Anonymous - 2019-08-28

    Dear Andrew,

    are we talking about the local orbitals energies?

    best
    Michael

     

Andrew Shyichuk

Andrew Shyichuk - 2019-08-28

Dear Michael,

I was talking about variable linearization energies of order 3 local orbitals, found in LINENGY.OUT file.

Regards,
Andrew

 

https://sourceforge.net/p/elk/discussion/897820/thread/7dd37b146a/ 

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