A MATLAB function for the contraction process of a tensor network. It takes as input a tensor network and a contraction sequence describing how to contract the network to a single tensor or number. It returns a single tensor or number as output. This function can be obtained by downloading the preprint source.
An application for visualization of Fermi surfaces.
This application displays Fermi surfaces colored as a function of an arbitrary scalar quantities such as magnitude of Fermi velocities and superconducting gap. It only requires a minimum set of data to draw Fermi surfaces. FermiSurfer provides a simple graphical user interface; the user can smoothly turn on/off the stereogram, nodal-lines, etc.
3D drawing software for molecules and crystals. QtDraw supports drawings of 3D objects such as atomic orbitals, polygons and spline curves. By installing MultiPie, users can draw the above objects with the help of symmetry operations and irreducible representations. These functionalities can be called by Python code.
An application for DFTB (Density Functional Tight Binding) calculation combined with Divide-and-Conquer (DC) method. The DC-DFTB-K program enables geometry optimization and molecular dynamics simulation of large molecular systems with linear-scaling computational cost. DFTB electronic structure calculation of 1 million atom system has been demonstrated using MPI/OpenMP hybrid parallel computation on the K computer.
An application for calculating thermal transport properties based on the phonon Boltzman equation. This application has its own database for phonon properties of materials, and can utilize it for evaluating heat conductivity and specific heat of crystals, alloys, and heterostructures combining them. Phonon-energy resolved contribution to heat conductivity and specific heat can also be calculated. This application also supports calculation of time-dependent response and steady state analysis.
An application for modeling and visualization of molecules for quantum chemical calculation. This application implements a construction of
molecular structures with classical molecular dynamics simulation and structure optimization by simple generic force fields, and a preparation of input files for applications of quantum chemical calculation such as Gaussian. A binary package for Windows XP is available, and informal packages for Windows 7, iPad, and Linux exist.
A fee-charging structure database of organic materials crystal structures. Three-dimensional structure data of small molecules and metal-organic crystals determined by the X-ray diffraction measurement can be downloaded. The data are compiled and distributed by the Cambridge Crystallographic Data Centre (CCDC).
A database of structures and properties for various materials including polymers and inorganic substances. This database is maintained by National Institute of Materials Science (NIMS), and provides crystal structures, various physical properties, and phase diagrams for material science via a user interface based on web browsers. This database also provides calculation results of phase diagrams and electronic structures. This database can be used without charge after registration.
A commercial database of inorganic crystal structures. This database is run by FIZ Karlsruhe. 181,000 crystal structure data are registered as of March 2016. 6,000 crystal structure data are added per year on average, and data are updated twice per year based on data in published scientific journals.
An open-source application for molecular dynamics. This application can perform molecular dynamics simulation of biopolymers and solvents consisting of a number of molecules/atoms. It implements a number of force field sets and algorithms, and supports parallel computing based on OpenMP. Java graphical user interface (GUI) is also included.