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An Energy Integration Free Kubo-Bastin Formula Decomposition
1Université de Nouakchott, Avenue du Roi Faiçal, Nouakchott, 2373, Mauritania.
Abstract:
Kubo formulae play a central role in modern spintronics and condensed matter physics, serving as the foundational ground for studying transport responses in the linear regime. In this work, we propose a reformulation of the widely used Kubo-Bastin decompositions that eliminates the need for numerical energy integration. By performing these integrations analytically for generic periodic systems, our approach significantly reduces computational cost and simplifies the calculation of transport coefficients, while maintaining a clear distinction between the relevant Fermi-surface and Fermi-sea transport components.
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