# WannierTools: An open-source software package for novel topological materials

## TL;DR

WannierTools is an open-source software for analyzing topological materials, capable of classifying phases, identifying Weyl/Dirac points, and calculating Berry phases and surface states within the tight-binding framework.

## Contribution

It introduces a comprehensive tool that integrates various topological analysis functions for materials, enhancing research capabilities in topological condensed matter physics.

## Key findings

- Classifies topological phases using Wilson loop calculations
- Identifies Weyl/Dirac points and nodal lines in materials
- Calculates Berry curvature and surface state spectra

## Abstract

We present an open-source software package WannierTools, a tool for investigation of novel topological materials. This code works in the tight-binding framework, which can be generated by another software package Wannier90. It can help to classify the topological phase of given materials by calculating the Wilson loop and can get the surface state spectrum which is detected by angle-resolved photoemission (ARPES) and in scanning tunneling microscopy (STM) experiments. It also identifies positions of Weyl/Dirac points and nodal line structures, calculates the Berry phase around a closed momentum loop and Berry curvature in a part of the Brillouin zone.