BSEHOLE: Difference between revisions

Latest revision as of 10:53, 19 March 2024

BSEHOLE = [real array]

Description: BSEHOLE sets the coordinates of the fixed hole of the exciton wavefunction

If BSEHOLE is set in a BSE calculation, VASP computes exciton wavefunction for the first NBSEEIG states. The coordinates are provided in direct (fractional) coordinates.

When fixing the position of the particle, ensure that it is not fixed exactly at the center of an atom or coincides with a node of the wavefunction. To avoid that, shift the fixed coordinate slightly away from the center of the atom. Furthermore, the wavefunction of the fixed particle is taken at the nearest $\mathbf{G}$ -vector, whose exact position is written in the OUTCAR file

hole position is fixed at:

or

electron position is fixed at:

Related tags and sections

BSEELECTRON, NBSEEIG, BSE calculations, Plotting exciton wavefunction

@@ Line 1: / Line 1: @@
-{{TAGDEF|BSEHOLE|[integer],[integer],[integer]|}}
+{{TAGDEF|BSEHOLE|[real array]}}
-Description: {{TAG|BSEHOLE}} sets the coordinates of the fixed hole in the exciton wavefunction calculated in BSE. The coordinates are provided in direct (fractional) coordinates.
+Description: {{TAG|BSEHOLE}} sets the coordinates of the fixed hole of the exciton wavefunction
+----
+If {{TAG|BSEHOLE}} is set in a BSE calculation, VASP computes exciton wavefunction for the first {{TAG|NBSEEIG}} states.
+The coordinates are provided in direct (fractional) coordinates.
-The position of the fixed particle is provided in direct (fractional) coordinates
+When fixing the position of the particle, ensure that it is not fixed exactly at the center of an atom or coincides with a node of the wavefunction. To avoid that, shift the fixed coordinate slightly away from the center of the atom. Furthermore, the wavefunction of the fixed particle is taken at the nearest <math>\mathbf{G}</math>-vector, whose exact position is written in the {{FILE|OUTCAR}} file
+ hole position is fixed at:
+or
+ electron position is fixed at:
 == Related tags and sections ==
-{{TAG|BSE}}, {{TAG|BSEFATBAND}}, [[BSE calculations]]
+{{TAG|BSEELECTRON}}, {{TAG|NBSEEIG}}, [[BSE calculations]], [[Plotting exciton wavefunction]]
-{{sc|NBSEEIG|Examples|Examples that use this tag}}
 ----
 [[Category:INCAR tag]][[Category:Many-body perturbation theory]][[Category:Bethe-Salpeter equations]]