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We use the envelope function formalism ͓M. G. Burt, J. Phys. Condens. Matter 4, 6651 ͑1992͔͒ with the rigorous boundary conditions ͓B. A. Foreman, Phys. Rev. B 48, 4964 ͑1993͔͒ to analyze the tunneling properties of holes across an abrupt InP/In 0.53 Ga 0.47 As heterojunction. We compare our results to those derived with boundary conditions obtained from an ad hoc "symmetrized" form of Burt's Hamiltonian. Our analysis includes the coupling between heavy, light, and spin-orbit bands. Thedoi:10.1063/1.371575 fatcat:5uu234iu5nde3iidpgxbq4babe