Donor impurity states in coupled quantum well wires under hydrostatic pressure and applied electric field |
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Authors: | E Tangarife ME Mora-Ramos CA Duque |
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Institution: | 1. Instituto de Física, Universidad de Antioquia, AA 1226, Medellín, Colombia;2. Facultad de Ciencias, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, CP 62209, Cuernavaca, Morelos, Mexico |
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Abstract: | In this work we study the binding energy of the ground state for a hydrogenic donor impurity in laterally coupled GaAs/Ga1−xAlxAs quantum well wires, considering the simultaneous effects of hydrostatic pressure and applied electric field. We have used a variational method and the effective mass and parabolic band approximations. The low dimensional structure consists of two quantum well wires with rectangular transverse section coupled by a central Ga1−xAlxAs barrier. Our results are reported for several sizes of the structure and we have taken into account variations of the impurity position along the growth direction of the heterostructure. |
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Keywords: | Quantum well wires Hydrostatic pressure Electric field |
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