PROCAR: Difference between revisions
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The {{FILE|PROCAR}} file contains the spd- and site-projected wave function character of each orbital for static calculations. Various schemes for determining the projected wave function character are implemented in VASP. They are usually controlled by the tags {{TAG|LORBIT}} and {{TAG|RWIGS}}. The tag {{TAG|RWIGS}} must be specified in the {{FILE|INCAR}} file whenever {{TAG|LORBIT}}<10 and in this case the orbitals are projected onto spherical harmonics that are non-zero within the region determined by {{TAG|RWIGS}}. | |||
For {{TAG|LORBIT}}>=10, the tag {{TAG|RWIGS}} is not needed and the projection is done onto the projector functions. | For {{TAG|LORBIT}}>=10, the tag {{TAG|RWIGS}} is not needed and the projection is done onto the projector functions. | ||
* Format for {{TAG|LORBIT}} | * Format for {{TAG|LORBIT|11}} | ||
# of k-points: 5 # of bands: 26 # of ions: 3 | # of k-points: 5 # of bands: 26 # of ions: 3 | ||
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where <math>Y^\alpha_{lm}</math> is the spherical harmonic centered at ion index <math>\alpha</math>, <math>l,m</math> the angular moment and magnetic quantum and <math>\phi_{n\mathbf{k}}</math> the wavefunction. The line and column with "tot" is the corresponding sum of the line and column, respectively. | where <math>Y^\alpha_{lm}</math> is the spherical harmonic centered at ion index <math>\alpha</math>, <math>l,m</math> the angular moment and magnetic quantum and <math>\phi_{n\mathbf{k}}</math> the wavefunction. The line and column with "tot" is the corresponding sum of the line and column, respectively. | ||
For {{TAG|ISPIN}} | For {{TAG|ISPIN|2}}, {{FILE|PROCAR}} contains a second set of projections for the spin down channel. | ||
For {{TAG|LNONCOLLINEAR | For {{TAG|LNONCOLLINEAR|.TRUE.}}, three additional projections for each ion are printed and the output is similar to | ||
ion s py pz px dxy dyz dz2 dxz x2-y2 tot | ion s py pz px dxy dyz dz2 dxz x2-y2 tot | ||
1 0.144 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.145 | 1 0.144 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.145 | ||
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\langle \chi_{n {\bf k}}^\mu | Y_{lm}^\alpha \rangle | \langle \chi_{n {\bf k}}^\mu | Y_{lm}^\alpha \rangle | ||
\langle Y_{lm}^\alpha | \chi_{n {\bf k}}^\nu \rangle | \langle Y_{lm}^\alpha | \chi_{n {\bf k}}^\nu \rangle | ||
</math> and are calculated for | </math> and are calculated for the spinor <math>|\Psi_{n{k}}\rangle=\left(\begin{matrix}\chi_{n{k}}^\uparrow \\\chi_{n{k}}^\downarrow \end{matrix}\right)</math> and the Pauli matrices: | ||
<math> | <math> | ||
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</math> | </math> | ||
The first set is the total (absolute) magnetization, while the remaining three sets of entries correspond to the three directions <math>j=1,2,3</math>. | The first set is the total (absolute) magnetization, while the remaining three sets of entries correspond to the three directions <math>j=1,2,3</math>. | ||
== Related tags and articles == | |||
Tags: {{TAG|LORBIT}}, {{TAG|RWIGS}}, {{TAG|ISPIN}}, {{TAG|LNONCOLLINEAR}} | |||
Files: {{FILE|PROCAR_OPT}} | |||
[[Category:Files]][[Category:Output files]] | [[Category:Files]][[Category:Output files]] | ||
Latest revision as of 15:48, 20 March 2026
The PROCAR file contains the spd- and site-projected wave function character of each orbital for static calculations. Various schemes for determining the projected wave function character are implemented in VASP. They are usually controlled by the tags LORBIT and RWIGS. The tag RWIGS must be specified in the INCAR file whenever LORBIT<10 and in this case the orbitals are projected onto spherical harmonics that are non-zero within the region determined by RWIGS. For LORBIT>=10, the tag RWIGS is not needed and the projection is done onto the projector functions.
- Format for
LORBIT = 11
# of k-points: 5 # of bands: 26 # of ions: 3
k-point 1 : 0.00000000 0.00000000 0.00000000 weight = 0.06250000
band 1 # energy -17.37867948 # occ. 1.00000000
ion s py pz px dxy dyz dz2 dxz x2-y2 tot
1 0.144 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.145
2 0.291 0.000 0.006 0.000 0.000 0.000 0.000 0.000 0.000 0.298
3 0.291 0.000 0.006 0.000 0.000 0.000 0.000 0.000 0.000 0.298
tot 0.727 0.000 0.013 0.000 0.000 0.000 0.000 0.000 0.000 0.740
The header contains the information about the number of k-points, bands and how many ions are considered. The next line prints the k-point with the three coordinates in the first Brillouin zone and the corresponding k-point weight for the numerical integration followed by the band number and the energy and occupancy of the state. Each (k-point,band) pair contains the projections for every ion [math]\displaystyle{ |\langle Y_{lm}^{\alpha}|\phi_{n\mathbf{k}}\rangle|^2 }[/math], where [math]\displaystyle{ Y^\alpha_{lm} }[/math] is the spherical harmonic centered at ion index [math]\displaystyle{ \alpha }[/math], [math]\displaystyle{ l,m }[/math] the angular moment and magnetic quantum and [math]\displaystyle{ \phi_{n\mathbf{k}} }[/math] the wavefunction. The line and column with "tot" is the corresponding sum of the line and column, respectively.
For ISPIN = 2, PROCAR contains a second set of projections for the spin down channel.
For LNONCOLLINEAR = .TRUE., three additional projections for each ion are printed and the output is similar to
ion s py pz px dxy dyz dz2 dxz x2-y2 tot
1 0.144 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.145
2 0.291 0.000 0.006 0.000 0.000 0.000 0.000 0.000 0.000 0.298
3 0.291 0.000 0.006 0.000 0.000 0.000 0.000 0.000 0.000 0.298
tot 0.727 0.000 0.013 0.000 0.000 0.000 0.000 0.000 0.000 0.740
1 -0.011 -0.000 -0.000 -0.000 -0.000 -0.000 -0.000 0.000 -0.000 -0.011
2 -0.023 -0.000 -0.000 0.000 0.000 -0.000 -0.000 0.000 -0.000 -0.023
3 -0.023 -0.000 -0.000 0.000 0.000 -0.000 -0.000 0.000 -0.000 -0.023
tot -0.057 -0.000 -0.001 0.000 0.000 -0.000 -0.000 0.000 -0.000 -0.058
1 -0.142 -0.000 0.000 0.000 0.000 0.000 -0.000 -0.000 -0.000 -0.142
2 -0.286 0.000 -0.006 -0.000 -0.000 0.000 -0.000 -0.000 0.000 -0.293
3 -0.286 0.000 -0.006 -0.000 -0.000 0.000 -0.000 -0.000 0.000 -0.293
tot -0.715 0.000 -0.012 -0.000 -0.000 0.000 -0.000 -0.000 0.000 -0.727
1 -0.024 -0.000 0.000 -0.000 -0.000 0.000 -0.000 0.000 -0.000 -0.024
2 -0.048 0.000 -0.001 0.000 0.000 0.000 -0.000 0.000 0.000 -0.049
3 -0.048 0.000 -0.001 0.000 0.000 0.000 -0.000 0.000 0.000 -0.049
tot -0.119 0.000 -0.002 0.000 0.000 0.000 -0.000 0.000 0.000 -0.121
Here the entries correspond to the projected magnetizations [math]\displaystyle{ 1/2\sum_{\mu,\nu=1}^2\sigma_{\mu\nu}^j \langle \chi_{n {\bf k}}^\mu | Y_{lm}^\alpha \rangle \langle Y_{lm}^\alpha | \chi_{n {\bf k}}^\nu \rangle }[/math] and are calculated for the spinor [math]\displaystyle{ |\Psi_{n{k}}\rangle=\left(\begin{matrix}\chi_{n{k}}^\uparrow \\\chi_{n{k}}^\downarrow \end{matrix}\right) }[/math] and the Pauli matrices:
[math]\displaystyle{ \sigma^x = \left(\begin{matrix} 0 & 1 \\ 1 & 0 \\ \end{matrix}\right), \quad \sigma^y = \left(\begin{matrix} 0 & -i \\ i & 0 \\ \end{matrix}\right), \quad \sigma^z = \left(\begin{matrix} 1 & 0 \\ 0 & -1 \\ \end{matrix}\right) }[/math]
The first set is the total (absolute) magnetization, while the remaining three sets of entries correspond to the three directions [math]\displaystyle{ j=1,2,3 }[/math].
Related tags and articles
Tags: LORBIT, RWIGS, ISPIN, LNONCOLLINEAR
Files: PROCAR_OPT