Re: [SIESTA-L] wsf.band.max problem

2018-02-06 Thread KAREEKUNNAN Afsal
Dear Maryam Jamaati, 

Could you please elaborate your problem. What did you mean by "for different 
physical systems". 

Thanks & Regards 
Afsal 


From: "maryam jamaati"  
To: siesta-l@uam.es 
Sent: Monday, February 5, 2018 2:20:30 PM 
Subject: Re: [SIESTA-L] wsf.band.max problem 

Dear Afsal, 

Thanks a lot for your kind helps. We read the mentioned tutorial. But our 
problem doesn't solve. 
We want to know how one can specify WFS.Band.Max for different physical 
systems. 

Best regards, 
Maryam Jamaati 

On Fri, Feb 2, 2018 at 2:13 AM, KAREEKUNNAN Afsal < [ mailto:af...@jaist.ac.jp 
| af...@jaist.ac.jp ] > wrote: 



Dear Maryam Jamaati, 

It is specified by putting the number of highest band you need to calculate 
fatbands. An example is given below. 

WFS.Write.For.Bands .true. 
WFS.Band.Min 1 
WFS.Band.Max 10 

This gives the information for bands from 1 to 10. Note that WFS.Band.Min 
represent the band with lowest energy. 

You may also refer to this tutorial by Prof. Javier Junquera on fatbands. 

[ 
http://personales.unican.es/junqueraj/JavierJunquera_files/Metodos/Structuralproperties/Fatbands-SrTiO3/Exercise-Fatbands-SrTiO3.pdf
 | 
http://personales.unican.es/junqueraj/JavierJunquera_files/Metodos/Structuralproperties/Fatbands-SrTiO3/Exercise-Fatbands-SrTiO3.pdf
 ] 

For more tutorials, refer to his page 

[ 
http://personales.unican.es/junqueraj/JavierJunquera_files/Metodos/Hands-on-session.html
 | 
http://personales.unican.es/junqueraj/JavierJunquera_files/Metodos/Hands-on-session.html
 ] 

Thanks & Regards 
Afsal 


From: "maryam jamaati" < [ mailto:m.sjama...@gmail.com | m.sjama...@gmail.com ] 
> 
To: [ mailto:siesta-l@uam.es | siesta-l@uam.es ] 
Sent: Friday, February 2, 2018 1:48:49 AM 
Subject: [SIESTA-L] wsf.band.max problem 

Dear siesta users, 
How we can specify number of wfs.band.max for calculation of fatband? 

sincerely yours, 

maryam jamaati 







Re: [SIESTA-L] Band Structure and PDOS results not matching

2018-02-06 Thread Suman Chowdhury
Again thank you so so much Prof. Nick Papior

On Sun, Feb 4, 2018 at 11:44 PM, Nick Papior  wrote:

> I used PDOS from siesta, just as you said you did in your original post.
>
> 2018-02-04 17:25 GMT+01:00 Suman Chowdhury :
>
>> Just let me know how did you calculate the DOS..
>>
>> On Sat, Feb 3, 2018 at 3:04 AM, Nick Papior  wrote:
>>
>>> Dear Suman,
>>>
>>> I think you should solve this yourself.
>>>
>>> 2018-02-02 5:56 GMT+01:00 Suman Chowdhury :
>>>
 Dear Nick Papior,

 Thank you so so much for your help. Can you help me in this regard
 about how I can get the correct coordinates for plotting the band
 structure??

 On Thu, Feb 1, 2018 at 3:56 PM, Nick Papior 
 wrote:

> If I run your system without performing cell relaxations I find the
> attached eigenvalues (for the Monkhorst-Pack grid).
>
> In this case there is *only* a bandgab of ~0.5 eV. Provided that the
> cell-relaxation does not change the spectrum drastically then this is what
> you should suspect in the PDOS.
> Secondly, the PDOS is *exactly* reproducing the bandgab in this
> calculation.
>
> 1) I would highly suggest you to perform cell/coordinate relaxations
> in one directory, then afterwards perform analysis on the relaxed
> structure, PDOS, band-structure, optical, etc.
> 2) Possibly your band-structure coordinates are wrong because when I
> plot the bandstructure for this structure it does not capture the correct
> band gab (this *has* to be the problem).
>
> 2018-01-31 16:35 GMT+01:00 Suman Chowdhury  >:
>
>> I have just tried to see the variation of TDOS by changing the
>> smearing parameter. But I could not observe any change in it.
>>
>> On Wed, Jan 31, 2018 at 6:44 PM, Suman Chowdhury <
>> sumanchowdhur...@gmail.com> wrote:
>>
>>> This is the fdf that I have used...
>>>
>>> On Thu, Jan 25, 2018 at 11:40 AM, Nick Papior 
>>> wrote:
>>>
 Dear Suman,

 Without data (plots) or fdf file it is very difficult to help you.
 It could be that your smearing parameter is too large.


 2018-01-24 15:13 GMT+01:00 Suman Chowdhury <
 sumanchowdhur...@gmail.com>:

> Dear SIESTA User,
>
> Recently I am getting some confusing results by using SIESTA.
> While plotting a band structure I am getting a band gap which is quite
> large. However, when I am trying to plot its corresponding total 
> partial
> density of states (PDOS), I can clearly see that there is no 
> existence of
> any band gap. But interestingly the component PDOS are giving the 
> required
> band gap. The problem is with the total PDOS. Do any of you have any 
> idea
> about these kinds of results...
>
> --
> *Dr. Suman Chowdhury*
>
>
>
> *Assistant Professor Dept. of Physics, Bangabasi College Kolkata-
> 79, West Bengal, India.*
>
>


 --
 Kind regards Nick

>>>
>>>
>>>
>>> --
>>> *Dr. Suman Chowdhury*
>>>
>>>
>>>
>>> *Assistant Professor Dept. of Physics, Bangabasi College Kolkata-
>>> 79, West Bengal, India.*
>>>
>>>
>>>
>>
>>
>> --
>> *Dr. Suman Chowdhury*
>>
>>
>>
>> *Assistant Professor Dept. of Physics, Bangabasi College Kolkata-
>> 79, West Bengal, India.*
>> * Ph no-+91-9830512232 <+91%2098305%2012232>*
>>
>>
>
>
> --
> Kind regards Nick
>



 --
 *Dr. Suman Chowdhury*



 *Assistant Professor Dept. of Physics, Bangabasi College Kolkata-
 79, West Bengal, India.*
 * Ph no-+91-9830512232 <+91%2098305%2012232>*


>>>
>>>
>>> --
>>> Kind regards Nick
>>>
>>
>>
>>
>> --
>> *Dr. Suman Chowdhury*
>>
>>
>>
>> *Assistant Professor Dept. of Physics, Bangabasi College Kolkata- 79,
>> West Bengal, India.*
>> * Ph no-+91-9830512232 <+91%2098305%2012232>*
>>
>>
>
>
> --
> Kind regards Nick
>



-- 
*Dr. Suman Chowdhury*



*Assistant Professor Dept. of Physics, Bangabasi College Kolkata- 79,
West Bengal, India.*
* Ph no-+91-9830512232*


[SIESTA-L] How to set spin polarization variables

2018-02-06 Thread Ananya Rajpoot
Dear users,

I am interested in simulation of Graphene ribbons doped with Fe.
How to appropriately set following variables for above system:

SpinPolarized true

NonCollinearSpin true or false???

FixSpin true or false?? Or when to use this variable?

TotalSpin what is the appropriate value?

Kindly provide suggestions, I will be highly thankful for your time and
suggestions.

Thank u so much...

With Regards
Anaya


[SIESTA-L] Mixing parameters for spin polarized calculation

2018-02-06 Thread Riya Rogers
Dear All,
I am trying to perform a spin polarized calculation on doped graphene
structure, my scf itearations taking toom much time.

Kindly give me suggestions for following:

1. which method should I choose for mixing :

SCF.Mixer.MethodPulay|Broyden|Linear

if pulay then  SCF.Mixer.Variant original ??

2. Also, which mixing is better for spin polarized:

 SCF.Mix Hamiltonian|density|charge

3. And most important for spin what to choose among

 SCF.Mix.Spin all|spinor|sum|sum+diff


Kindly help me out.


Thanks for your help

Regards
Riya


[SIESTA-L] Fwd: How to set spin polarization variables

2018-02-06 Thread Ananya Rajpoot
Dear users,

I am interested in simulation of Graphene ribbons doped with Fe.
How to appropriately set following variables for above system:

SpinPolarized true

NonCollinearSpin true or false???

DM.InitSpinAF true or false??

FixSpin true or false?? Or when to use this variable?

TotalSpin what is the appropriate value?

Kindly provide suggestions, I will be highly thankful for your time and
suggestions.

Thank u so much...

With Regards
Anaya