Approximate any l-state solutions of Dirac equation for modified deformed Hylleraas potential by the Nikiforov–Uvarov method

We inquire into spin and pseudospin symmetries of Dirac equation under modified deformed Hylleraas potential via a Pekeris approximation and the Nikiforov-Uvarov technique. A tensor interaction of Coulomb form is considered and its degeneracy-removing role is discussed in detail. The solutions are reported for arbitrary quantum number in a compact form and useful numerical data are included.