[Wien] Delta(d) from :QTL's corresponded to :PCS's
Saeid Jalali
s_jalali_a at yahoo.com
Thu Aug 10 13:06:25 CEST 2006
Dear WIEN2k community,
For a cubic point group one expects that delta (d) = (d_xy+d_x2-y2)-1/2*(d_xz+d_yz)+d_z2 is zero. Thus I assume that the following given d_e_g, 0.3974, equally is distributed in d_x2-y2=0.3974/2 and d_z2=0.3974/2, and similarly the following d_t2g=0.7171 is equally distributed in d_xy=0.7171/3, d_xz=0.7171/3 and d_yz=0.7171/3:
:PCS001: PARTIAL CHARGES SPHERE = 1 S,P,D,F, D-EG,D-T2G
:QTL001: 2.1138 5.8961 1.1146 1.0194 0.0000 0.0000 0.0000 0.3974 0.7171 0.0000 0.0000 0.0000
If the above assumption, which I am not sure about it, is true then delta (d) as expected is zero.
Form a spin polarized calculation I have obtained the following results:
:PCS001: PARTIAL CHARGES SPHERE = 1 S,P,D,F,PZ,PXY, D-Z2,D-XY,X2Y2,D-XZ,YZ
:QTL001: 0.9682 2.5982 5.3246 0.9516 0.8643 1.7338 0.0000 1.0694 2.1361 2.1192 0.0000 0.0000
0.9518 0.9519 0.9514
:QTL001: 0.9663 2.5888 5.2987 0.0166 0.8599 1.7289 0.0000 1.0625 2.1282 2.1080 0.0000 0.0000
I have expected form several physical reasons, e.g. being close to the cubic point group, to be the delta (d) not far from zero. However, again with assuming to be distributed equally (which I am not sure about it) the d_xy_up=2.1361 as well as d_xy_dn=2.1282 in d_xz_up and d_yz_up as well as d_xz_dn and d_yz_dn respectively, the occupation numbers can be written as follows:
d_z2=1.0694+1.0625
d_xy=(2.1361+2.1282)/3=d_xz=d_yz
d_x2-y2=2.1192+2.1081
In this case I have obtained the value of 2.0954 for the delta(d), which is so far from my expectation.
Other way of treating this result, closing eyes on the physical expectation, is to just find the following one to one corresponded values of QTLs to the PCSs:
d_z2=1.0694+1.0625
d_xy=2.1361+2.1282
d_x2-y2=2.1192+2.1081
d_xz=d_yz=0
In this case delta (d) is 6.3597, which is extremely large!
Any comments are most welcome.
With my best whishes for all of you,
Sincerely yours,
S. Jalali.
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Saeid Jalali Asadabadi,
Department of Physics, Faculty of Science,
University of Isfahan (UI), Hezar Gerib Avenue,
81744 Isfahan, Iran.
Phones:
Dep. of Phys. :+98-0311-793 2435
Office :+98-0311-793 2430
Fax No. :+98-0311-793 2409
E-mail :s_jalali_a at yahoo.com
www :http://www.ui.ac.ir
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