Solutions of Dirac Equation for Symmetric Generalized Woods-Saxon   Potential by the Hypergeometric Method
  The Dirac equation is solved approximately for the Hulthen potential with the pseudospin symmetry for any spin-orbit quantum number $\kappa$ in the position-dependent mass background. Solutions are obtained reducing the Dirac equation into a Schr\"{o}dinger-like differential equation by using an appropriate coordinate transformation. The Nikiforov-Uvarov method is used in the calculations to get energy eigenvalues and the corresponding wave functions. 
Sameer M. Ikhdair and Ramazan Sever