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Magnetostriction of an electron‐hole drop in Ge
Author(s) -
Wolfe J. P.,
Markiewicz R. S.,
Furneaux J. E.,
Kelso S. M.,
Jeffries C. D.
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.2220830134
Subject(s) - drop (telecommunication) , perpendicular , electron , condensed matter physics , magnetic field , excitation , germanium , electric field , materials science , physics , optics , atomic physics , geometry , silicon , optoelectronics , telecommunications , mathematics , quantum mechanics , computer science
By infrared imaging the shape of a strain‐confined electron‐hole drop in germanium is measured in an applied magnetic field, H ≦ 22 kOe. A considerable distortion from sphericity is observed for all field orientations and stress geometries studied. It is found that in most cases the drop flattens along the field direction. For II ‖〈111〉‖ (applied stress) the drop shape depends markedly on the position of the light excitation spot on the crystal. The dimension parallel to the field decays more rapidly than the perpendicular dimension. The data strongly support a dynamic interpretation in which the recombination currents of electrons and holes give rise to the field‐induced distortion.