The plot of exciton spatial distribution is always in the middle of structure ?

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Luo Yan
Posts: 31
Joined: Fri Jun 18, 2021 10:10 am
Location: Chengdu

The plot of exciton spatial distribution is always in the middle of structure ?

Post by Luo Yan » Tue Mar 01, 2022 3:03 am

Dear all,
I try to plot exciton spatial distribution with xcrysden, but the plots of exciton spatial distribution is always in the middle of structure instead of the hole position. I don't know this plot is OK. If not, how can I solve the problem ?
Thanks for your kind helps.
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Luo Yan
Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China

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Daniele Varsano
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Joined: Tue Mar 17, 2009 2:23 pm
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Re: The plot of exciton spatial distribution is always in the middle of structure ?

Post by Daniele Varsano » Tue Mar 01, 2022 8:13 am

Dear Luo,
Please explain what you need to plot: 3d isosurface or wavefunction integrated in some direction? Please also post your ypp input file.

Best,
Daniele
Dr. Daniele Varsano
S3-CNR Institute of Nanoscience and MaX Center, Italy
MaX - Materials design at the Exascale
http://www.nano.cnr.it
http://www.max-centre.eu/

Luo Yan
Posts: 31
Joined: Fri Jun 18, 2021 10:10 am
Location: Chengdu

Re: The plot of exciton spatial distribution is always in the middle of structure ?

Post by Luo Yan » Tue Mar 01, 2022 9:07 am

Dear Daniele,
Thanks for your help once again !! I want to plot the in-plane exciton spatial distribution for a heterojunction, thus, the hole position was set in the center of Mo atoms in the lower layer. But the 2D plot of exciton spatial distribution is arranged in the middle of heterojunction. I have tried many times in different cases, the plots are always in the middle of the layered structure wherever hole position is. I don't known what's mean. Thank you !!!
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Luo Yan
Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China

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Daniele Varsano
Posts: 4002
Joined: Tue Mar 17, 2009 2:23 pm
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Re: The plot of exciton spatial distribution is always in the middle of structure ?

Post by Daniele Varsano » Wed Mar 02, 2022 8:24 am

Dear Luo Yan,

In 2D plot the exciton wavefunction is averaged (integrated) along the z direction:

wf_plot(x,y)=\int_z |psi_Exc|^2 dz

for convention, the plane is set in the centre, but being integrated along z, it is irrelevant where the plane lies.

Best,
Daniele
Dr. Daniele Varsano
S3-CNR Institute of Nanoscience and MaX Center, Italy
MaX - Materials design at the Exascale
http://www.nano.cnr.it
http://www.max-centre.eu/

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