The influence of the magnetic field on the effect of drag of electrons by phonons in n-CdxHg1 − xTe

Thermopower in n -Cd 0.2 Hg 0.8 Te (6–100 K) is studied. A large effect of drag of the charge carriers by phonons α ph is found. The influence of the magnetic field H on the drag thermopower is considered. It is established that the magnetic field exerts the effect mainly on the electron component of α ph . The data are interpreted in the context of the theory taking into account the effect of H on thermopower α ph , in which parameter A (ɛ) proportional to the static force of the drag effect is introduced. By the experimental data α ph ( T , H ), T , and H dependences A (ɛ) are determined. It is shown that, as H increases, A (ɛ) sharply decreases. This explains a decrease in α ph in the magnetic field, power index k in dependence α ph ∝ T −κ , and narrowing the region of manifestation of the drag effect. It is established that at classically high fields, the drag effect in n -Cd 0.2 Hg 0.8 Te does not vanish.