Re: [Wien] Question Regarding NMR Calculations and Nuclear quadrupole coupling Constant

2017-11-23 Thread pieper
To clarify this: Yes, there is a line shift by nuclear quadrupole interaction, and, depending on the size of the EFG, it can be significant for the determinatation of chemical shift or even Knight shift. It appears in perturbation theory beyond first order, which describes the familiar

Re: [Wien] Question Regarding NMR Calculations and Nuclear quadrupole coupling Constant

2017-11-22 Thread Peter Blaha
This is a question to NMR-experimentalists. They usually know how they obtain the CS and quadrupol splitting from their experimental data. I don't think the quadrupole moment influences the value of the CS. On 11/22/2017 11:24 AM, sandeep Kumar wrote: Dear Professor Peter Blaha and Dr. Robert

[Wien] Question Regarding NMR Calculations and Nuclear quadrupole coupling Constant

2017-11-22 Thread sandeep Kumar
Dear Professor Peter Blaha and Dr. Robert Laskowski, It is known that quadrupolar nuclei such as 17O the resonance frequency is a combination of the chemical shift and the isotropic quadrupole coupling (goes like Cq^2/w0, Cq is the coupling and w0 is the Larmor frequency) and for a perfectly

Re: [Wien] Question regarding spin scaling (xc1) implementation in wien2k

2016-07-06 Thread Peter Blaha
No, the total energy has not been implemented. Only the potential. Am 07.07.2016 um 02:37 schrieb Wen Fong Goh: Dear wien2k developers, I would like to know does the wien2k calculation with spin scaling (xc1) give a consistent total energy value? I looked up the subroutines in SRC_lapw0,

Re: [Wien] Question regarding wien2wannier for wannier.spn file

2016-03-19 Thread Elias Assmann
On 03/17/2016 02:54 PM, Santu Baidya wrote: > There is module kpath to plot the energy bands coloured by the > expectation value of the spin along [001]: > > " Error: Problem opening input file wannier.spn Error on node 0: > examine the output/error files for details" > > Can anyone please help

[Wien] QUESTION regarding p-n junction DOS

2015-09-06 Thread prasenjit roy
Dear Prof. Blaha and WIEN2K users, I have a question regarding physics. We tried to do a calculation for an organic(p-type)-inorganic(n-type) interface for p-n junction photodiode. First we did a calculation for organic part, then the inorganic part and finally both together. All three of them

Re: [Wien] question regarding magetic moment

2015-07-19 Thread Xavier Rocquefelte
Dear Rishi Indeed, WIEN2K provides numbers with 4 digits however it does not mean that the value is accurate up to 4 digits. The accuracy will depend on: - the convergence criteria you are using. - the RMT you are using. Indeed the magnetic moment for each atom is estimated inside the

[Wien] question regarding magetic moment

2015-07-18 Thread Rishi Singh
Dear wien users I am unable to know that what is accuracy of magnetic moment calculated by wien2k package. Is it true that its accuracy is not up to .0001 Please help me regarding this. I will be highly obliged. Thanks in advance. kind regard Dr R P Singh

[Wien] question regarding

2014-05-07 Thread Muhammad Sajjad
Dear user I switched to new work place in another lab with different internet settings. when i wrote w2web in terminal, i received the following message (w2web server started, now point your web browser to http://msajjad:7890), same a before. When I opened the address (http://msajjad:7890), it is

Re: [Wien] question regarding

2014-05-07 Thread pieper
It seems, Wien2k is running on your local machine? My guess is, that you changed the name of your machine ('msajjad') when you moved and should setup w2web new. If Wien2k is not running on your local machine there is probably now a firewall between your new place and the machine running

Re: [Wien] question regarding

2014-05-07 Thread Muhammad Sajjad
Dear Pieper Thank you for your response. I build new w2web after removing the old one, and now it is working. Kind Regards M. Sajjad On Wed, May 7, 2014 at 6:09 PM, pieper pie...@ifp.tuwien.ac.at wrote: It seems, Wien2k is running on your local machine? My guess is, that you changed the

Re: [Wien] Question regarding simultaneous optimization of lattice parameters and atomic coordinates

2014-03-12 Thread Peter Blaha
Forget the case_1, ..2,... files. These are intermediate files during force optimization. As you said, you will get final case_abc_1.scf, ..2,.. files. They should have small forces (check it out) and have optimized internal positions. These files (energies) and the corresponding struct

Re: [Wien] Question regarding simultaneous optimization of lattice parameters and atomic coordinates

2014-03-12 Thread shamik chakrabarti
Sir, Thank you Sir. Thank you very much for your response. with regards, On Wed, Mar 12, 2014 at 11:47 AM, Peter Blaha pbl...@theochem.tuwien.ac.atwrote: Forget the case_1, ..2,... files. These are intermediate files during force optimization. As you said, you will get final

Re: [Wien] Question regarding volume expansion-contraction after extraction of Li ions

2014-03-10 Thread Peter Blaha
You cannot expect that a,b,c is correct when you fix atomic positions (which are allowed to vary according to symmetry). But without doing these calculations (or at least checking how large are the forces in your best structure) one cannot say anything. On the other hand: I do not know if the

Re: [Wien] Question regarding volume expansion-contraction after extraction of Li ions

2014-03-10 Thread shamik chakrabarti
Sir, The forces in our fully optimized structure is less than 3mRy/a.u. per atom...also we have done coordinate optimization by taking fully optimized lattice parameters.. Yes...we have not done the simultaneous optimization of lattice parameters and atomic coordinates...while we have

Re: [Wien] Question regarding volume expansion-contraction after extraction of Li ions

2014-03-10 Thread Peter Blaha
How large are the forces during the vol,ca,ba optimization (before you have done a final optimization) ? I do not know anything about the specific material or details of your results or the VASP calculations. How should I guide you ? I only know that technical one must optimize ALWAYS

[Wien] Question regarding volume expansion-contraction after extraction of Li ions

2014-03-09 Thread shamik chakrabarti
Dear wien2k users, We have simulated structural, elcetronic properties and cathode characteristics (in terms of voltage) of a Li based material. When we extract some Li ions from the parent compounds and optimize its volume and lattice parameters, we have obtained a decrements in volume.

[Wien] Question regarding volume optimization

2013-06-19 Thread shamik chakrabarti
Dear wien2k users, I have a query regarding volume optimization in wien2k. Option 1 optimizes the volume by keeping a:b:c = constant. Now my question is: in which case this Option 1 is applicable?...is it only applicable for cubic symmetry? Any response in this regard will be helpful for

Re: [Wien] Question regarding volume optimization

2013-06-19 Thread Stefaan Cottenier
I have a query regarding volume optimization in wien2k. Option 1 optimizes the volume by keeping a:b:c = constant. Now my question is: in which case this Option 1 is applicable?...is it only applicable for cubic symmetry? You can use it for any crystal. Very often, the total energy will

Re: [Wien] Question regarding volume optimization

2013-06-19 Thread shamik chakrabarti
Dear Stefaan Cottenier Sir, Thank you very much for your response. We got our answer. with regards, On Wed, Jun 19, 2013 at 3:03 PM, Stefaan Cottenier stefaan.cotten...@ugent.be wrote: I have a query regarding volume optimization in wien2k. Option 1 optimizes the volume by