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Negative differential perpendicular velocity in GaAs/AlAs superlattices |
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| Authors: | A. Sibille J. F. Palmier H. Wang J. C. Esnault F. Mollot |
| Affiliation: | C.N.E.T. - 196 Avenue H. Ravera 92220, Bagneux -, France CNRS - L2M - 196 Avenue H. Ravera 92220, Bagneux -, France |
| Abstract: | We investigate the doping level, hydrostatic pressure, temperature and superlattice parameter dependence of the perpendicular negative differential velocity (NDV) of GaAs/AlAs superlattices. The results show that NDV is a single Γ miniband effect. A qualitative agreement is found with Esaki's negative effective mass model, although a few limitations of this model are pointed out and some improvement is suggested. |
| Keywords: | Superlattices negative differential conductance perpendicular conduction miniband Gunn effec t localization quantum wells non linear transport intervalley transfer |
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