VASP

VASP
Torsten Maiwald · GFDL 1.2 · source
Name	VASP
Developer	Kohanoff group, Kresse group
Released	1993
Latest release	6.4.0
Programming language	Fortran
Operating system	Linux, Unix
Genre	Electronic structure software
License	Proprietary (academic)

VASP

VASP is a plane-wave, pseudopotential-based electronic structure package widely employed for first-principles quantum-mechanical molecular dynamics and static calculations. The program implements density functional theory, Hartree–Fock, and hybrid functional methods for solids, molecules, and surfaces, and is used across condensed matter physics, materials science, and chemistry. VASP’s capabilities include total-energy calculations, structure optimization, phonon and dielectric property evaluation, and ab initio molecular dynamics, making it central to computational studies that complement experimental work at institutions like Lawrence Berkeley National Laboratory, MIT, Max Planck Society, and IBM Research.

Introduction

VASP provides an implementation of the Kohn–Sham equations within the plane-wave basis and projector augmented-wave or ultrasoft pseudopotential formalisms, enabling calculations of electronic structure for periodic and non-periodic systems. The code supports exchange–correlation functionals such as the Local Density Approximation, Generalized Gradient Approximation, and range-separated hybrid schemes akin to Heyd–Scuseria–Ernzerhof. Users employ VASP to compute band structures, density of states, charge densities, and forces for simulations that feed into studies involving superconductivity at CERN-adjacent collaborations, catalysis research at Shell, and battery materials research at Oak Ridge National Laboratory. The package interfaces with visualization tools and workflows common at Argonne National Laboratory and in high-throughput efforts like those organized around the Materials Project.

History and Development

Development traces back to work by groups led by researchers who contributed to plane-wave pseudopotential methods in the late 1980s and early 1990s, building on theoretical foundations from figures associated with Walter Kohn and computational initiatives at Cornell University and University of Vienna. Over successive releases, authors added projector augmented-wave functionality inspired by the work of Peter E. Blöchl and later hybrid functional implementations influenced by developments at Bell Labs and collaborations with national labs including Sandia National Laboratories. Performance improvements parallel advances in supercomputing architectures from vendors like Cray, IBM, and Intel and software ecosystems such as MPI and OpenMP. VASP’s development has been shaped by the needs of research consortia and funding from agencies including National Science Foundation and European Research Council.

Architecture and Implementation

VASP’s codebase is written primarily in Fortran and organized around modular components that handle plane-wave transforms, pseudopotential application, self-consistent field iterations, and molecular dynamics integrators. Core numerical kernels rely on fast Fourier transform libraries like those used in projects at Argonne National Laboratory and vendor-optimized BLAS and LAPACK implementations from suppliers such as Intel and AMD. Parallelization employs message-passing paradigms standardized by Message Passing Interface. File formats produced by VASP are compatible with post-processing tools developed in research hubs like ETH Zurich, University of Cambridge, and Stanford University, and workflows often integrate with materials databases maintained by groups affiliated with Harvard University and University College London.

Applications and Use Cases

Researchers utilize VASP in investigations spanning electronic, magnetic, optical, and vibrational properties. Representative applications include modeling surface reactions studied in collaborations with Caltech and Lawrence Livermore National Laboratory, predicting phase diagrams used by industrial teams at BASF and Toyota Research Institute, and simulating defect energetics relevant to semiconductor development at Intel Corporation and TSMC. VASP is also employed in studies of two-dimensional materials connected to work at Rice University and University of Manchester, and in superconductivity research intersecting with groups at MIT and Brookhaven National Laboratory. High-throughput computational materials discovery pipelines, such as those advanced by the Materials Project and AFLOW consortium, frequently rely on VASP for reliable total-energy evaluations and transition-state searches tied to the Nudged Elastic Band method.

Performance and Validation

Performance of VASP has been benchmarked extensively on leadership-class systems provided by facilities like Oak Ridge Leadership Computing Facility and Fermi National Accelerator Laboratory. Scaling studies report strong parallel efficiency for medium to large plane-wave basis sets when using optimized math libraries and hybrid MPI/OpenMP strategies informed by work at NERSC. Validation against experiment and alternative codes has involved cross-comparisons with software from projects at Quantum ESPRESSO, ABINIT, and WIEN2k as well as experimental datasets from synchrotron facilities such as Diamond Light Source and Advanced Photon Source. Accuracy assessments examine cohesive energies, lattice constants, and band gaps with systematic investigations published in journals connected to institutions like Columbia University and University of California, Berkeley.

Licensing and Community Support

VASP is distributed under a proprietary academic license managed by the developers; usage policies and distribution practices are governed by agreements similar in scope to licensing approaches used by national-lab-linked software projects. User support is provided through mailing lists and user forums frequented by researchers at Imperial College London, EPFL, and University of Tokyo, while training occurs at workshops organized by societies such as the Materials Research Society and conferences including those hosted by American Physical Society. Community-developed utilities and high-throughput wrappers maintained by contributors from Princeton University and Argonne National Laboratory augment VASP’s ecosystem, enabling integration into automated workflows used in collaborative projects funded by agencies like Department of Energy.

Category:Electronic structure software