P. Kleinert, HIGH-FIELD MINIBAND TRANSPORT IN SEMICONDUCTOR SUPERLATTICES UNDER THE INFLUENCE OF A TRANSVERSE MAGNETIC-FIELD, Physica. B, Condensed matter, 251, 1998, pp. 891-894
The miniband transport in semiconductor superlattices under the influe
nce of high electric and magnetic fields aligned parallel to the super
lattice axis is treated within a rigorous quantum-mechanical approach,
Intra-collisional field effects due to the electric and magnetic held
are taken into account. Pronounced resonances are predicted to occur
in the current density due to Landau and Wannier-Stark quantization of
the electronic states and due to their scattering on polar-optical ph
onons. The combined electric and magnetic field effects are treated by
a non-equilibrium lateral electron distribution function, which is th
e solution of a quantum-kinetic equation. The field-dependent coupling
between longitudinal and transverse degrees of freedom via the latera
l distribution function leads to a non-separable dependence of the cur
rent on the electric and magnetic fields. Wannier-Stark current oscill
ations are strongly enhanced by high magnetic fields. The experimental
ly detected crossover in the temperature dependence of the current is
reproduced, Finally, the influence of an electric field on magneto-pho
non resonances is studied, (C) 1998 Elsevier Science B.V. All rights r
eserved.