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QuantumATK => General Questions and Answers => Topic started by: Parveen on February 8, 2016, 13:37

Title: Significance and meaning of LDDOS Plot
Post by: Parveen on February 8, 2016, 13:37

Hi All,

I was trying to plot LDDOS plot for a device structure and end up with a plot looks like multiple LDDOS plots are merged onto same plot. I can't figure out if it a real plot or i went wrong somewhere while plotting it. Also tell me what is the significance of plotting it. Is it for the counter-check of the results obtained by Transmission spectra? what does Transmission coefficient T(E)>1 signifies in context of LDDOS plot.

Thank you

Title: Re: Significance and meaning of LDDOS Plot
Post by: Jess Wellendorff on February 9, 2016, 10:53

We need some more info in order to say anything about weather the plot is ok or not. Scripts and data.

Wrt. significance of the LDOS plot, it gives you a spatial (real-space) picture of the density of states, whereas a standard DOS plot (DOS vs. energy) does not.

Title: Re: Significance and meaning of LDDOS Plot
Post by: Parveen on February 9, 2016, 13:34

PFA

Title: Re: Significance and meaning of LDDOS Plot
Post by: Jess Wellendorff on February 10, 2016, 10:15

Would it make sense to do

Code

avg_z = ldos.axisProjection('average', 'c')

http://www.quantumwise.com/documents/manuals/latest/ReferenceManual/index.html/ref.localdevicedensityofstates.html (http://www.quantumwise.com/documents/manuals/latest/ReferenceManual/index.html/ref.localdevicedensityofstates.html)

Title: Re: Significance and meaning of LDDOS Plot
Post by: Parveen on February 12, 2016, 12:57

I can't figure out why this is important? Though while plotting DOS with the help of 1D Projector i got following plot PFA. Maybe averaging along C axis is not required but, is it destroying the LDDOS plot in anyway?
Moreover i did't find this line
avg_z = ldos.axisProjection('average', 'c')
in either of my scripts.