[DFTB-Plus-User] R: NEGF+XTB

Benjamin Hourahine benjamin.hourahine at strath.ac.uk
Mon Apr 18 20:49:15 CEST 2022


Dear Luca,

The shell ordering issue should now be fixed in the main code (https://github.com/dftbplus/dftbplus/pull/1003) and these changes will hopefully propagate to the xTB branch soon.

Regards

Ben

       Dr. B. Hourahine, SUPA, Department of Physics,
     University of Strathclyde, John Anderson Building,
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________________________________
From: DFTB-Plus-User <dftb-plus-user-bounces at mailman.zfn.uni-bremen.de> on behalf of Alessandro Pecchia <alessandro.pecchia at cnr.it>
Sent: 18 April 2022 10:33
To: 'User list for DFTB+ related questions' <dftb-plus-user at mailman.zfn.uni-bremen.de>
Subject: [DFTB-Plus-User] R: NEGF+XTB

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Dear Luca,

ok, clearly there are some issues about the input parsing logic.
I will try to have a look later on this week in order to make the code running.

Simple non self-consistent transmission calculations should run easily. Then scc should also run.
Please bare in mind that scc transport calculations, at least initially, will be compatible with GFN1-xtb only.

Regards,

A. Pecchia


-----Messaggio originale-----
Da: DFTB-Plus-User [mailto:dftb-plus-user-bounces at mailman.zfn.uni-bremen.de] Per conto di luca.sementa at pi.ipcf.cnr.it
Inviato: lunedì 18 aprile 2022 09:23
A: dftb-plus-user at mailman.zfn.uni-bremen.de
Oggetto: [DFTB-Plus-User] NEGF+XTB

Dear Benjamin

I did what you said. When I tried to calculate the contact for the Au chain the code gets stuck with:

> I am sorry... cannot proceed. orbital shells should be in the order
> s,p,d

then I gave a try to the graphene_x test. In this case, the code calculates both the contacts, however, when trying with the transport calculation the code still complains and prints the message:

Eigensolver incompatible with transport calculation (GreensFunction or TransportOnly required)

Best Regards
Luca

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