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Plasmon‐enhanced sound amplification in piezoelectric semiconductors under a strong magnetic field
Author(s) -
Lima C. A. S.,
Miranda L. C. M.
Publication year - 1977
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.2220800106
Subject(s) - condensed matter physics , semiconductor , magnetic field , phonon , plasmon , piezoelectricity , materials science , physics , field (mathematics) , optoelectronics , acoustics , quantum mechanics , mathematics , pure mathematics
Abstract The effect is considered of a strong dc magnetic field upon the contribution to sound amplification in piezoelectric semiconductors arising from the energy conversion mechanism “plasmon + + carrier → phonon + carrier”. An explicit expression is derived for the amplification coefficient. It is shown that under suitable conditions such contribution largely differs from that in the absence of a magnetic field both in the strength of the effect and in the angular distribution of the emitted phonons. A physical interpretation of the results is presented.