Vasp5.4 - Revision history

Snuadmin at 07:02, 30 July 2025

2025-07-30T07:02:48Z

Snuadmin at 06:54, 30 July 2025

2025-07-30T06:54:53Z

Vinay.muskan at 05:29, 20 May 2024

2024-05-20T05:29:44Z

Vinay.muskan at 05:29, 20 May 2024

2024-05-20T05:29:31Z

10.5.0.129: Created page with "183x100px '''The Vienna Ab initio Simulation Package (VASP)''' is a computer program for atomic scale materials modelling, e.g...."

2023-12-01T09:17:22Z

Created page with "left|link=|183x100px '''The Vienna Ab initio Simulation Package (VASP)''' is a computer program for atomic scale materials modelling, e.g...."

New page

[[File:vasp_logo.png|left|link=|183x100px]]

'''The Vienna Ab initio Simulation Package (VASP)''' is a computer program for atomic scale materials modelling, e.g. electronic structure calculations and quantum-mechanical molecular dynamics, from first principles. VASP computes an approximate solution to the many-body Schrödinger equation, either within density functional theory (DFT), solving the Kohn-Sham equations, or within the Hartree-Fock (HF) approximation, solving the Roothaan equations. Hybrid functionals that mix the Hartree-Fock approach with density functional theory are implemented as well. Furthermore, Green's functions methods (GW quasiparticles, and ACFDT-RPA) and many-body perturbation theory (2nd-order Møller-Plesset) are available in VASP. In VASP, central quantities, like the one-electron orbitals, the electronic charge density, and the local potential are expressed in plane wave basis sets. The interactions between the electrons and ions are described using norm-conserving or ultrasoft pseudopotentials, or the projector-augmented-wave method. To determine the electronic groundstate, VASP makes use of efficient iterative matrix diagonalisation techniques, like the residual minimisation method with direct inversion of the iterative subspace (RMM-DIIS) or blocked Davidson algorithms. These are coupled to highly efficient Broyden and Pulay density mixing schemes to speed up the self-consistency cycle.

'''Introduction''' VASP is a complex package for performing ab-initio quantum-mechanical molecular dynamics (MD) simulations using pseudopotentials or the projector-augmented wave method and a plane wave basis set. The approach implemented in VASP is based on the (finite-temperature)local-density approximation with the free energy as variational quantity andan exact evaluation of the instantaneous electronic ground state at each MD time step. VASP uses efficient matrix diagonalisation schemesand an efficient Pulay/Broyden charge density mixing.These techniques avoid all problems possibly occurring in the original Car-Parrinello method,which is based on the simultaneous integration of electronic and ionicequations of motion.The interaction between ions and electrons is described by ultra-softVanderbilt pseudopotentials (US-PP) or by the projector-augmentedwave (PAW) method.US-PP (and the PAW method) allow for a considerablereduction of the number of plane-waves per atom fortransition metals and first row elements.Forces and the full stress tensor can be calculated with VASP and used to relaxatoms into their instantaneous ground-state. Vasp Manual

[[Vasp Manual|File:Vasp Manual.pdf]]

'''Environment Variables required for running VASP on Magus.'''

'''Job Submission script'''

{| class=" wikitable" style="height: 56px;" width="1066"
|-
||
Example can be copied from /data/jobscript/VASP

|}
'''Explanation is given below in braces.'''

{| class=" wikitable" style="height: 546px;" width="1039"
|-
||
#!/bin/bash

SBATCH --partition=medium # include the appropriate partition, node, ntasks, ntasks-pernode for the respective SLURM key

SBATCH --ntasks=128 #SBATCH --job-name=VASP ##SBATCH --mail-user= ##SBATCH --mail-type=all #SBATCH --output vasp.%J.out #SBATCH --error vasp.%J.err Inputs###

modify the appropriate version of the executableexport exec_name=/data/apps/VASP5.4/IntelMPI/5.4.4/bin/vasp_std

keep the input file on the local directory where this job is launched

ulimit -s unlimited module purge module load compiler/2022.0.2 mkl/2022.0.2 mpi/2021.2.0

export I_MPI_FABRICS=shm:ofi export UCX_TLS=sm,ud export UCX_NET_DEVICES=mlx5_0:1

 export FI_PROVIDER=mlx export UCX_UNIFIED_MODE=y export UCX_USE_MT_MUTEX=y

export OMP_NUM_THREADS=1 #export I_MPI_PIN_ORDER=bunch #export I_MPI_PIN_DOMAIN=core

|}

@@ Line 37: / Line 37: @@
  SBATCH --partition=medium # include the appropriate partition, node, ntasks, ntasks-pernode for the respective SLURM key
- SBATCH --ntasks=128<br /> #SBATCH --job-name=VASP<br /> ##SBATCH --mail-user=<br /> ##SBATCH --mail-type=all<br /> #SBATCH --output vasp.%J.out<br /> #SBATCH --error vasp.%J.err<br /> Inputs###
+ SBATCH --ntasks=128<br /> #SBATCH --job-name=VASP<br /> ##SBATCH --mail-user=<br /> ##SBATCH --mail-type=all<br /> #SBATCH --output vasp.%J.out<br /> #SBATCH --error vasp.%J.err<br />
@@ Line 51: / Line 56: @@
- export OMP_NUM_THREADS=1<br />
+ export OMP_NUM_THREADS=1
 |}

← Older revision		Revision as of 06:54, 30 July 2025
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−	export OMP_NUM_THREADS=1<br /> ~~#export I_MPI_PIN_ORDER=bunch<br /> #export I_MPI_PIN_DOMAIN=core~~	+	export OMP_NUM_THREADS=1<br />

	\|}		\|}

← Older revision		Revision as of 05:29, 20 May 2024
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← Older revision		Revision as of 05:29, 20 May 2024
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−	[[File:~~vasp_logo~~.png\|left\|~~link=\|183x100px~~]]	+	[[File:275px-vasp logo.1716182944939.png\|left\|frameless]]


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		+	'''The Vienna Ab initio Simulation Package (VASP)''' is a computer program for atomic scale materials modelling, e.g. electronic structure calculations and quantum-mechanical molecular dynamics, from first principles.<br />VASP computes an approximate solution to the many-body Schrödinger equation, either within density functional theory (DFT), solving the Kohn-Sham equations, or within the Hartree-Fock (HF) approximation, solving the Roothaan equations. Hybrid functionals that mix the Hartree-Fock approach with density functional theory are implemented as well. Furthermore, Green's functions methods (GW quasiparticles, and ACFDT-RPA) and many-body perturbation theory (2nd-order Møller-Plesset) are available in VASP.<br />In VASP, central quantities, like the one-electron orbitals, the electronic charge density, and the local potential are expressed in plane wave basis sets. The interactions between the electrons and ions are described using norm-conserving or ultrasoft pseudopotentials, or the projector-augmented-wave method.

		+	<br />To determine the electronic groundstate, VASP makes use of efficient iterative matrix diagonalisation techniques, like the residual minimisation method with direct inversion of the iterative subspace (RMM-DIIS) or blocked Davidson algorithms. These are coupled to highly efficient Broyden and Pulay density mixing schemes to speed up the self-consistency cycle.

−
−
−
−
−	'''The Vienna Ab initio Simulation Package (VASP)''' is a computer program for atomic scale materials modelling, e.g. electronic structure calculations and quantum-mechanical molecular dynamics, from first principles.<br />VASP computes an approximate solution to the many-body Schrödinger equation, either within density functional theory (DFT), solving the Kohn-Sham equations, or within the Hartree-Fock (HF) approximation, solving the Roothaan equations. Hybrid functionals that mix the Hartree-Fock approach with density functional theory are implemented as well. Furthermore, Green's functions methods (GW quasiparticles, and ACFDT-RPA) and many-body perturbation theory (2nd-order Møller-Plesset) are available in VASP.<br />In VASP, central quantities, like the one-electron orbitals, the electronic charge density, and the local potential are expressed in plane wave basis sets. The interactions between the electrons and ions are described using norm-conserving or ultrasoft pseudopotentials, or the projector-augmented-wave method.<br />To determine the electronic groundstate, VASP makes use of efficient iterative matrix diagonalisation techniques, like the residual minimisation method with direct inversion of the iterative subspace (RMM-DIIS) or blocked Davidson algorithms. These are coupled to highly efficient Broyden and Pulay density mixing schemes to speed up the self-consistency cycle.

	'''Introduction'''<br />VASP is a complex package for performing ab-initio quantum-mechanical molecular dynamics (MD) simulations using pseudopotentials or the projector-augmented wave method and a plane wave basis set. The approach implemented in VASP is based on the (finite-temperature)local-density approximation with the free energy as variational quantity andan exact evaluation of the instantaneous electronic ground state at each MD time step. VASP uses efficient matrix diagonalisation schemesand an efficient Pulay/Broyden charge density mixing.These techniques avoid all problems possibly occurring in the original Car-Parrinello method,which is based on the simultaneous integration of electronic and ionicequations of motion.The interaction between ions and electrons is described by ultra-softVanderbilt pseudopotentials (US-PP) or by the projector-augmentedwave (PAW) method.US-PP (and the PAW method) allow for a considerablereduction of the number of plane-waves per atom fortransition metals and first row elements.Forces and the full stress tensor can be calculated with VASP and used to relaxatoms into their instantaneous ground-state.<br />Vasp Manual		'''Introduction'''<br />VASP is a complex package for performing ab-initio quantum-mechanical molecular dynamics (MD) simulations using pseudopotentials or the projector-augmented wave method and a plane wave basis set. The approach implemented in VASP is based on the (finite-temperature)local-density approximation with the free energy as variational quantity andan exact evaluation of the instantaneous electronic ground state at each MD time step. VASP uses efficient matrix diagonalisation schemesand an efficient Pulay/Broyden charge density mixing.These techniques avoid all problems possibly occurring in the original Car-Parrinello method,which is based on the simultaneous integration of electronic and ionicequations of motion.The interaction between ions and electrons is described by ultra-softVanderbilt pseudopotentials (US-PP) or by the projector-augmentedwave (PAW) method.US-PP (and the PAW method) allow for a considerablereduction of the number of plane-waves per atom fortransition metals and first row elements.Forces and the full stress tensor can be calculated with VASP and used to relaxatoms into their instantaneous ground-state.<br />Vasp Manual