Many-body theory of the Auger Auger-electron coincidence spectroscopy (AAECS) spectra of solids

► A many-body theory of Auger Auger-electron coincidence spectroscopy (AAECS) spectra is formulated. ► The basic AAECS spectra feature of solids are discussed. ► The calculated AAECS spectrum of MnO agrees well with the experimental one.