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Galvanomagnetic effects in many‐valley semiconductors for strong magnetic and heating electric fields
Author(s) -
Mitin V. V.
Publication year - 1972
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220490111
Subject(s) - condensed matter physics , electron , electric field , magnetic field , anisotropy , semiconductor , electrical resistivity and conductivity , hall effect , scattering , conductivity , physics , phonon , electric current , transverse plane , optics , quantum mechanics , structural engineering , engineering
The effect of the heating of electrons on the conductivity of many‐valley semiconductors in strong (but not quantitizing) transverse magnetic fields is studied. It is shown that at low temperatures the current‐voltage characteristic is of S‐type, when the main mechanism of the intervalley scattering of the hot electrons is the emission of inter‐valley phonons. The anisotropy of conductivity is not only reduced but also changes its sign when the electric field grows. The conductivity in strong magnetic fields can be greater than σ 0 (σ 0 is σ for H ≡ 0, E x → 0) within a certain region of the electric field strength. All these effects take place as a result of the influence of the Hall field on the heating of electrons and their redistribution with respect to the valleys.