[DFTB-Plus-User] Excited State calculation: Multiple StateOfInterest and format of TRA.DAT
Dirk Ziemann
dirk.ziemann at physik.hu-berlin.de
Wed Jun 28 16:49:37 CEST 2017
Dear all,
I have two questions concerning the excited state calculation.
I am interested in the Mulliken charges of many different excited
states. If I specify a single state of interest at StateOfInterest
everything works fine, but there is an error for multiple numbers. Is it
possible to get the Mulliken charges for many different states at
once? (I need >1000 states)
In my TRA.DAT files I see the following lines (see below). Why does a
transition appears multiple times?
As far as I have checked it, this happens only to the first transition.I
have a feeling that it is related to the value of OscillatorWindow. If I
choose a high value this does not happen. The smaller the value the
higher the number of "multiple first transitions".
Thank you for your help and best wishes Dirk
everything the same in dftb_in.hsd except the ExcitedState-part
example 1:
Energy 1 3.625 eV S
Transition Weight KS [eV]
=============================================
13723 -> 13908 0.7361 4.616
13723 -> 13908 0.5047 4.616
13723 -> 13908 0.3897 4.616
13723 -> 13908 0.2272 4.616
1011 -> 20029 0.0000 39.368
1011 -> 20028 0.0000 39.368
dftb_in.hsd
ExcitedState {
Casida {
NrOfExcitations = 100
StateOfInterest = 0
Symmetry = singlet
OscillatorWindow = 1E-1
WriteStatusArnoldi = Yes
WriteTransitions = Yes
}
}
//==============================================//
example 2
Energy 1 3.754 eV S
Transition Weight KS [eV]
=============================================
13749 -> 13754 0.8301 3.754
13749 -> 13754 0.4022 3.754
13749 -> 13754 0.3398 3.754
13749 -> 13754 0.1559 3.754
13749 -> 13754 0.0687 3.754
13749 -> 13754 0.0550 3.754
13749 -> 13754 0.0417 3.754
215 -> 20033 0.0000 39.768
215 -> 20035 0.0000 39.768
dftb_in.hsd
ExcitedState {
Casida {
NrOfExcitations = 30
StateOfInterest = 0
Symmetry = singlet
OscillatorWindow = 1E-2
WriteStatusArnoldi = Yes
WriteTransitions = Yes
}
}
--
Dirk Ziemann
Humboldt Universität zu Berlin, Institut für Physik
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