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#1 2025-05-10 01:47:53

liujie2022
Member
Registered: 2022-08-30
Posts: 15

How to compute crystal-field parametes and decompositions of Ln^{2/3+}

Dear molcas developers:

I want to compute the crystal-field parametes and decompostions of RASSI wave functions for differenct oxidations of Ln^{n+} in the SINGLE_ANISO module, but I found that this module can only compute the case of Ln^{3+}, for example, Dy^{3+} of J=15/2. When I get the RASSI wave functions with J=8 for Dy^{2+}, the SINGLE_ANISO module still computes the crystal-field parametes and decompostions for J=15/2.

Following is my output of RASSI computation, with the perfect wave functions of J=8 for isolated Dy^{2+} ion.

Eigenvalues of complex Hamiltonian:
   -----------------------------------
  (Shifted by EMIN (a.u.) =     -12145.7726435677)

 SO State       Relative EMIN(au)   Rel lowest level(eV)    D:o, cm**(-1)     J-value  Omega

     1            -0.0251596205        0.0000000000              0.0000         8.0     3.4
     2            -0.0251596205        0.0000000000              0.0000         8.0     3.9
     3            -0.0251596205        0.0000000000              0.0000         8.0     4.4
     4            -0.0251596205        0.0000000000              0.0000         8.0     4.0
     5            -0.0251596205        0.0000000000              0.0000         8.0     5.1
     6            -0.0251596205        0.0000000000              0.0000         8.0     4.2
     7            -0.0251596205        0.0000000000              0.0000         8.0     4.8
     8            -0.0251596205        0.0000000000              0.0000         8.0     4.1
     9            -0.0251596205        0.0000000000              0.0000         8.0     4.1
    10            -0.0251596205        0.0000000000              0.0000         8.0     6.0
    11            -0.0251596205        0.0000000000              0.0000         8.0     4.8
    12            -0.0251596205        0.0000000000              0.0000         8.0     6.0
    13            -0.0251596205        0.0000000000              0.0000         8.0     4.2
    14            -0.0251596205        0.0000000000              0.0000         8.0     6.9
    15            -0.0251596205        0.0000000000              0.0000         8.0     5.5
    16            -0.0251596205        0.0000000000              0.0000         8.0     4.5
    17            -0.0251596205        0.0000000000              0.0000         8.0     6.0
    18            -0.0083865402        0.4564187671           3681.2656         7.0     4.8
    19            -0.0083865402        0.4564187671           3681.2656         7.0     3.7

Then, I implemented SINGLE_ANISO module with the following parameters:

&SINGLE_ANISO
  MLTP
   1
   17
  UBAR
  CRYS
   Dy
  TINT
   0 300 301
  XFIE
   0.50
  HINT
   0 7.0 71
  TMAG
   5  2.0 3.0 5.0 8.0 10.0
  MAVE
   1 10
End Of Input

However, the section of CFP output is as follows:

CALCULATION OF CRYSTAL-FIELD PARAMETERS OF THE GROUND ATOMIC MULTIPLET J = 15/2.

The decomposition output section is as follows:

DECOMPOSITION OF THE RASSI WAVE FUNCTIONS CORRESPONDING TO THE LOWEST ATOMIC MULTIPLET J = 15/2
IN WAVE FUNCTIONS WITH DEFINITE PROJECTION OF THE TOTAL MOMENT ON THE QUANTIZATION AXIS


--------|----------------------------------------------------------|----------------------------------------------------------|
 | JM > |                ab initio state  1                        |                ab initio state  2                        |
--------|-------  Real  -------|------  Imaginary  -------|-Weight-|-------  Real  -------|------  Imaginary  -------|-Weight-|
|-15/2> | +0.10000000000000E+01  +0.00000000000000E+00 *I | 100.0 %| +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %|
|-13/2> | +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %| +0.10000000000000E+01  +0.00000000000000E+00 *I | 100.0 %|
|-11/2> | +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %| +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %|
| -9/2> | +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %| +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %|
| -7/2> | +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %| +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %|
| -5/2> | +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %| +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %|
| -3/2> | +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %| +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %|
| -1/2> | +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %| +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %|
|  1/2> | +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %| +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %|
|  3/2> | +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %| +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %|
|  5/2> | +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %| +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %|
|  7/2> | +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %| +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %|
|  9/2> | +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %| +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %|
| 11/2> | +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %| +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %|
| 13/2> | +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %| +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %|
| 15/2> | +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %| +0.00000000000000E+00  +0.00000000000000E+00 *I |   0.0 %|

They are still about the results of J=15/2, but I expect to obtain the results of J=8. If there are parameters to set the oxidation or J value of Dy ion in the SINGLE_ANISO module. If no, which src files in the single_aniso directory should I modify and recompile the molcas to realize this end? Thanks for your help.

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