P. Kleinert et Vv. Bryksin, HIGH-FIELD MINIBAND TRANSPORT IN SEMICONDUCTOR SUPERLATTICES IN PARALLEL ELECTRIC AND MAGNETIC-FIELDS, Physical review. B, Condensed matter, 56(24), 1997, pp. 15827-15835
We present a rigorous quantum-mechanical description of the miniband t
ransport in semiconductor superlattices under the mutual influence of
high electric and magnetic fields aligned parallel to the growth direc
tion. Strong current oscillations appear due to Landau and Wannier-Sta
rk quantization of the electronic states and due to the scattering on
polar-optical phonons. The combined influence of an electric and magne
tic field on magnetophonon and electrophonon resonances is treated by
a lateral electron distribution function, which is the solution of a q
uantum-kinetic equation. The lateral electron heating due to the field
dependent coupling between longitudinal and transverse degrees of fre
edom via the distribution function is essential to understand miniband
transport properties of superlattices. Intracollisional field effects
are taken into account. Strong magnetic fields lead to a pronounced e
nhancement of Wannier-Stark current oscillations. The experimentally d
etected crossover in the temperature dependence of the current is repr
oduced. The influence of an electric field on magnetophonon resonances
is investigated. [S0163-1829(97)02847-6].