Publication Date:
1999-11-01
Description:
In order to understand the induced electron-density response of covalently bonded materials to an externally applied electric field, the change of structure-factor phases of several weak reflections of GaAs has been measured by three-beam interferences. Using a modulation technique, phase variations of the order of 1° for a field strength of 1 kV mm−1 were determined. Although the statistics of these first experiments are rather poor, the experiment verifies qualitatively the predictions of a semi-empirical bond-charge model. The measured phase variation is the smallest value determined up to now.
Print ISSN:
0108-7673
Electronic ISSN:
2053-2733
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics