HOMO-LUMO/Spin Gap

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gelemsso
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HOMO-LUMO/Spin Gap

#1 Post by gelemsso » Tue Jul 30, 2013 12:00 am

Hi, I'm a new user of VASP . I have three simple question that confuse me.
1) I want to calculate spin-gap. So I chose for majority channel(HOMO E = -3.8066, LUMO E = -3.3506) and minority channel (HOMO E = -3.6543, LUMO E = -3.5312) from th output shown below, Am I correct? Here is my OUTPUT. I got the following using vaspscript homolumo.
Number of Bands = 96
k-point 1 : 0.0000 0.0000 0.0000 HOMO = 74 E = -3.8066 LUMO = 75 E = -3.3506 BandGap = -0.456
HOMO = 75 E = -3.3506 LUMO = 76 E = -1.4497 BandGap = -1.9009
k-point 1 : 0.0000 0.0000 0.0000 HOMO = 31 E = -3.6543 LUMO = 32 E = -3.5312 BandGap = -0.1231
HOMO = 32 E = -3.5312 LUMO = 33 E = -3.5157 BandGap = -0.0155000000000003
HOMO = 33 E = -3.5157 LUMO = 34 E = -3.5052 BandGap = -0.0105
HOMO = 34 E = -3.5052 LUMO = 35 E = -3.2987 BandGap = -0.2065
HOMO = 35 E = -3.2987 LUMO = 36 E = -3.2889 BandGap = -0.00980000000000025
HOMO = 36 E = -3.2889 LUMO = 37 E = -3.2300 BandGap = -0.0589
HOMO = 37 E = -3.2300 LUMO = 38 E = -3.2220 BandGap = -0.00800000000000001
HOMO = 38 E = -3.2220 LUMO = 39 E = -3.1835 BandGap = -0.0385
HOMO = 39 E = -3.1835 LUMO = 40 E = -2.9132 BandGap = -0.2703
HOMO = 40 E = -2.9132 LUMO = 41 E = -2.9065 BandGap = -0.00669999999999993
2) I read on this forum about this question but I didn't get the point. Is there any way that 'mag' from OSIZCAR be equal to the 'tot' from OUTCAR? I played a lot with RWIGS to get a match answer where "tot' and 'mag" are equal but I couldn't. Pls any one have an idea how to do it?
3)In order to get the magnetic moment of each element of a cluster, I took 'tot" and divide by the number of atoms in the cluster.This is average. AM I correct? How can I get the magnetic moment of each for an alloys?

If some one can help me, I would appreciate very much
Anteneh

<span class='smallblacktext'>[ Edited ]</span>
Last edited by gelemsso on Tue Jul 30, 2013 12:00 am, edited 1 time in total.

support_vasp
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Re: HOMO-LUMO/Spin Gap

#2 Post by support_vasp » Thu Sep 12, 2024 8:04 am

Hi,

We're sorry that we didn’t answer your question. This does not live up to the quality of support that we aim to provide. The team has since expanded. If we can still help with your problem, please ask again in a new post, linking to this one, and we will answer as quickly as possible.

Best wishes,

VASP


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