Position-dependent mass models and their nonlinear characterization
arXiv:0706.0607 · doi:10.1088/1751-8113/40/49/F01
Abstract
We consider the specific models of Zhu-Kroemer and BenDaniel-Duke in a sech$^{2}$-mass background and point out interesting correspondences with the stationary 1-soliton and 2-soliton solutions of the KdV equation in a supersymmetric framework.
8 Pages, Latex version, Two new references are added, To appear in J.Phys.A (Fast Track Communication)