<div dir="ltr">please consider it as a speculation:<br>I guess you are using GGA for your calculations. It may make sense to check whether such problem appears within LDA or not.<br><br>Javad Hashemifar<br><br><br><div class="gmail_quote">
On Tue, Jul 29, 2008 at 9:19 AM, Stefaan Cottenier <span dir="ltr"><<a href="mailto:Stefaan.Cottenier@fys.kuleuven.be">Stefaan.Cottenier@fys.kuleuven.be</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>
Hello again,<br>
<br>
I have been too optimistic, yesterday. The reported problem<br>
("eigenvalues below...") did indeed disappear when I modified the<br>
sphere radii and/or put deep semi-core states in the core, as reported<br>
yesterday. But when I applied the same modification to a Cu atom at a<br>
different site in Ge (a case that was working well with the old<br>
settings), exactly the same problem now appeared there...<br>
<br>
This happens, in the very first iteration, in a directory that was<br>
freshly initialized with not old files lingering around:<br>
<br>
an error message in lapw2_3.error: 'l2main' - QTL-B.GT.15.,<br>
Ghostbands, check scf files<br>
<br>
end of case.scf2_3 :<br>
<br>
QTL-B VALUE .EQ. ********** in Band of energy -5.71041 ATOM=<br>
5 L= 2<br>
Check for ghostbands or EIGENVALUES BELOW XX messages<br>
Adjust your Energy-parameters or use -in1new switch, check RMTs !!!<br>
<br>
But atom 5 (which is Ge) does not have states at that energy:<br>
<br>
0.30 4 0 (GLOBAL E-PARAMETER WITH n OTHER CHOICES, global APW/LAPW)<br>
2 -1.82 0.010 CONT 1<br>
2 0.30 0.000 CONT 1<br>
0 0.30 0.000 CONT 1<br>
1 0.30 0.000 CONT 1<br>
<br>
The only other element in the cell is Cu (ATOM 1), which has these<br>
linearization energies:<br>
<br>
0.30 4 0 (GLOBAL E-PARAMETER WITH n OTHER CHOICES, global APW/LAPW)<br>
1 0.30 0.000 CONT 1<br>
1 -5.36 0.005 STOP 1<br>
2 0.30 0.010 CONT 1<br>
0 0.30 0.000 CONT 1<br>
<br>
It looks like eigenstates for Cu and Ge are somehow interchanged by<br>
the error message...?<br>
<br>
The end of case.scf1_3 :<br>
<br>
:EIG00936: 1.9587652 1.9605022 1.9620300 1.9651681 1.9677904<br>
:EIG00941: 1.9709236 1.9759120 1.9783975 1.9822565 1.9843245<br>
:EIG00946: 1.9858109 1.9880890 1.9903135 1.9927309 1.9944311<br>
<br>
:EIG00951: 1.9963998 1.9968078 1.9992533<br>
2 EIGENVALUES BELOW THE ENERGY -9.00000<br>
********************************************************<br>
<br>
:KPT : NUMBER OF K-POINTS: 1<br>
<br>
All other case.scf1_* files have "0 eigenvalues below". And these are<br>
the deepest eigenvalues in case.scf1:<br>
<br>
:RKM : MATRIX SIZE 5615LOs: 908 RKM= 6.53 WEIGHT= 8.00 PGR:<br>
EIGENVALUES ARE:<br>
:EIG00001: -4.9618775 -4.9618775 -4.9618749 -1.4433134 -1.4425104<br>
:EIG00006: -1.4425104 -1.4424955 -1.4415851 -1.4415851 -1.4414788<br>
:EIG00011: -1.4414788 -1.4414291 -1.4414284 -1.4412709 -1.4412709<br>
:EIG00016: -1.4411669 -1.4411669 -1.4410760 -1.4410224 -1.4409746<br>
<br>
Here are the linearization energies that lapw1 determined (no in1new):<br>
<br>
For Cu:<br>
<br>
<br>
ATOMIC SPHERE DEPENDENT PARAMETERS FOR ATOM Cu1<br>
:e__0001: OVERALL ENERGY PARAMETER IS 0.3000<br>
OVERALL BASIS SET ON ATOM IS LAPW<br>
:E1_0001: E( 1)= 0.3000<br>
APW+lo<br>
:E1_0001: E( 1)= -4.9650 E(BOTTOM)= -4.995 E(TOP)= -4.935<br>
LOCAL ORBITAL<br>
:E2_0001: E( 2)= -0.0450 E(BOTTOM)= -0.270 E(TOP)= 0.180<br>
APW+lo<br>
:E0_0001: E( 0)= 0.3000<br>
APW+lo<br>
<br>
For Ge:<br>
<br>
ATOMIC SPHERE DEPENDENT PARAMETERS FOR ATOM Ge3<br>
:e__0004: OVERALL ENERGY PARAMETER IS 0.3000<br>
OVERALL BASIS SET ON ATOM IS LAPW<br>
:E2_0004: E( 2)= -1.4450 E(BOTTOM)= -1.530 E(TOP)= -1.360<br>
APW+lo<br>
:E2_0004: E( 2)= 0.3000<br>
LOCAL ORBITAL<br>
:E0_0004: E( 0)= 0.3000<br>
APW+lo<br>
:E1_0004: E( 1)= 0.3000<br>
APW+lo<br>
<br>
I used RKMax=6.53 (Kmax=3.00), and 4 k-points -- values that should be<br>
more than good enough for reasonable results. Changing the initial<br>
linearization energies did not help to the values reported case.scf1<br>
did not help.<br>
<br>
The real reason of this behaviour must lie elsewhere...?<br>
<br>
Stefaan<br>
<br>
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</blockquote></div><br><br clear="all"><br>-- <br>======================================<br>Seyed Javad Hashemifar, Ph.D.<br>current address:<br>Physics Department, University of Duisburg-Essen, <br>47057 Duisburg, Germany<br>
Tel:+49 203 379 4743 Fax:+49 203 379 4742<br>permanent address:<br>Physics Department, Isfahan University of Technology<br>84154 Isfahan, Iran<br>Tel: +98 311 391 2375 Fax:+98 311 3912376<br>---------------------------------------------------------------------------<br>
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