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Crossed and Parallel‐Field Magneto‐Electro‐Reflectance of Germanium in Nonuniform Electric Fields
Author(s) -
Evangelisti F.,
Frova A.
Publication year - 1969
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.19690330216
Subject(s) - electric field , landau quantization , germanium , quantization (signal processing) , field (mathematics) , condensed matter physics , physics , reflectivity , optics , magneto , materials science , magnetic field , optoelectronics , voltage , silicon , quantum mechanics , mathematics , pure mathematics , algorithm
Room‐temperature magneto‐electro‐reflectance experiments near the fundamental edge of germanium have been performed in both the crossed and parallel‐field configuration, using a “day” field‐effect system to achieve zero‐to‐peak modulation of the electric field. The results show that the E ‖ H spectra can be described in terms of photon‐assisted tunneling at each of the Landau levels, although the interpretation of the data is not straightforward due to the strong nonuniformity of the electric field. For E ⊥ H the period of the Landau levels is smaller than in the E ‖ H case and there is evidence that quantization effects are absent in the region of high electric field immediately below the surface. The results suggest that the technique described here may be a convenient tool to investigate magneto‐electro‐effects.