(1+1)-Dirac particle with position-dependent mass in complexified Lorentz scalar interactions

The effect of the built-in supersymmetric quantum mechanical language on the spectrum of the (1+1)-Dirac equation, with position-dependent mass (PDM) and complexified Lorentz scalar interactions, is re-emphasized. The signature of the ”quasi-parity” on the Dirac particles’ spectra is also studied. A ”quasi-free” Dirac particle with PDM via an inversely linear plus linear model, a Dirac particle with PDM and complexified scalar interactions of the form S (z) = S (x− ib) (an inversely linear plus linear, leading to a PT −symmetric oscillator model), and S (x) = Sr (x) + iSi (x) (a PT -symmetric Scarf II model) are considered. Moreover, a first-order intertwining differential operator and an η-weak-pseudoHermiticity generator are presented and a complexified PT -symmetric periodic-type model is used as an illustrative example. PACS numbers: 03.65.Ge, 03.65.Pm, 03.65.Fd, 03.65. Ca