Gor'kov-Hedin Equations for Quantum Many-Body Systems with Spin-Dependent Interactions

Abstract: Driven by the need to understand and determine the presence of non-trivial superconductivity in real candidate materials, we present a generalized set of self-consistent Gor'kov-Hedin equations in a vibrating lattice with spin dependent electron-electron and electron-phonon interactions. This extends Hedin's original equations to treat quantum many-body systems where electronic and lattice correlations along with relativistic effects coexist on the same footing. Upon iterating this set of equations, the corresponding spin-dependent GW approximation and generalized ladder approximations are constructed.