Using Python to study the Lifshitz transition in the Dirac semimetal PtTe2 triggered by a magnetic element substitution

PtTe₂ belongs to the family of transition metal dichalcogenides (TMDs) and has garnered significant attention as a type-II Dirac semimetal due to its unique electronic properties. Angle-resolved photoemission spectroscopy (ARPES) measurements are able to reveal its detailed electronic structure and Fermi surface topology. Magnetic element substitution through chromium alloying (Cr_xPt_1-xTe₂) induces modifications to the electronic band structure, particularly a topological reconstruction of the Fermi surface known as a Lifshitz transition. We utilize custom Python-based analysis software to characterize the electronic structure evolution in Cr_xPt_1-xTe₂ through contour mapping and Euler characteristic calculations of the Fermi surface. Our analysis demonstrates systematic changes in Fermi surface topology with increasing chromium concentration, suggesting the emergence of a Lifshitz transition. Initial findings will be presented along with ongoing developments of additional analytical methods to characterize this topological phase transition.