  The ability to simulate realistically the electronic structure of
superconducting materials is important to understand and predict various
properties emerging in both the superconducting topological and spintronics
realms. We introduce a tight-binding implementation of the Bogoliubov-de Gennes
method, parameterized from density functional theory, which we utilize to
explore the bulk and thin films of Nb, known to host a significant
superconducting gap. The latter is useful for various applications such as the
exploration of trivial and topological in-gap states. Here, we focus on the
simulations aspects of superconductivity and study the impact of temperature,
Cooper-pair coupling and dimensionality on the size of the superconducting
order parameter.
