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wienfaq [2014/05/21 11:20] – created danielwienfaq [2014/05/21 12:09] janettate
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 ====== Ask The Doctor! ====== ====== Ask The Doctor! ======
 +    * Q. //When all else fails ... a.k.a. "I'm doing everything right, but it still messes up" ..//
 +Wien is modular - it's the weakness and the strength - and sometimes it just takes too long to figure out which file has been overwritten by what process.  Start again in a completely new folder.  Often, it takes just a few minutes to get back to the point that took you two days to reach!  
     * Q. //How does Wien calculate band structure?//     * Q. //How does Wien calculate band structure?//
 Wien2k implements a method called FLAPW (**F**ull potential **L**inearized **A**ugmented **P**lane **W**ave) - actually a specific variant called: APW+LO (APW + **L**ocal **O**rbitals).  It is different from a pseudopotential method, which is also commonly found in the literature.  {{:blaha_talk.pdf|Here}} is a talk by Prof Blaha, one of Wien's developers, on the program and some of its uses. Wien2k implements a method called FLAPW (**F**ull potential **L**inearized **A**ugmented **P**lane **W**ave) - actually a specific variant called: APW+LO (APW + **L**ocal **O**rbitals).  It is different from a pseudopotential method, which is also commonly found in the literature.  {{:blaha_talk.pdf|Here}} is a talk by Prof Blaha, one of Wien's developers, on the program and some of its uses.

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