“…Among the variety of methods for producing epitaxial films, viz. sol-gel process, sputtering, metal organic chemical vapor deposition, molecular beam epitaxy [5][6][7][8], the pulsed laser deposition (PLD) can yield crack-free, dense films with stoichiometry corresponding to that of the target material [9,10]. However, epitaxial growth of LN films with PLD is still a challenge due to the appearance of secondary phases, such as the Li-deficient phase and the Li-rich phase [11,12].…”