This paper investigates the solution of Schrödinger equation for Kronig-Penney potential, by using our newly developed filter method (Phys. Rev E 96(3), 033302 (2017)). The method enables us to obtain energy spectrum and their corresponding eigen function, for various number of lattices, width of lattice, width ratio between potential barrier and potential well, and the height of barrier. It was obtained that the numerical results well agree with the analytic solutions.

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