Relaxation time approximations in PAOFLOW 2.0
Materials Science
2021-11-18 v1
Abstract
Regardless of its success, the constant relaxation time approximation has limited validity. Temperature and energy dependent effects are important to match experimental trends even in simple situations. We present the implementation of relaxation time approximation models in the calculation of Boltzmann transport in PAOFLOW 2.0 and apply those to model band-structures. In addition, using a self-consistent fitting of the model parameters to experimental conductivity data, we provide a flexible tool to extract scattering rates with high accuracy. We illustrate the approximations using simple models and then apply the method to GaAs, Si, Mg3Sb2, and CoSb3.
Cite
@article{arxiv.2111.09274,
title = {Relaxation time approximations in PAOFLOW 2.0},
author = {Anooja Jayaraj and Ilaria Siloi and Marco Fornari and Marco Buongiorno Nardelli},
journal= {arXiv preprint arXiv:2111.09274},
year = {2021}
}
Comments
20 pages, 7 figures