An updated version of BoltzWann: A code for the evaluation of thermoelectric and electronic transport properties with a maximally-localized Wannier functions basis |
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| Authors: | Giovanni Pizzi Dmitri Volja Boris Kozinsky Marco Fornari Nicola Marzari |
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| Affiliation: | 1. Theory and Simulation of Materials, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland;2. Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA;3. Research and Technology Center, Robert Bosch LLC, Cambridge, MA 02139, USA;4. Department of Physics, Central Michigan University, Mount Pleasant, MI 48859, USA |
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| Abstract: | BoltzWann is a code to evaluate thermoelectric and electronic transport properties of extended systems with a maximally-localized Wannier function basis set. The semiclassical Boltzmann transport equations for the homogeneous infinite system are solved in the constant relaxation-time approximation and band energies and band derivatives are obtained via Wannier interpolations. Thanks to the exponential localization of the Wannier functions obtained, very high accuracy in the Brillouin zone integrals can be achieved with very moderate computational costs. Moreover, the analytical expression for the band derivatives in the Wannier basis resolves any issues that may occur when evaluating derivatives near band crossings. We present here an updated version of the BoltzWann code, which is now fully integrated within Wannier90 version 2.0, with minor bug fixes and the possibility to study also two-dimensional systems. |
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| Keywords: | Maximally-localized Wannier functions Wannier90 Band interpolation Band velocities Thermoelectric properties |
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