Abstract
High-resolution grating x-ray diffraction from a periodic quantum-wire structure is shown to be highly sensitive to strain-field variations near a surface or an interface. Information on two types of strain gradients can be obtained: a longitudinal gradient, which can produce asymmetric diffraction profiles, and a transverse gradient, which can generate additional diffuse intensity streaks in reciprocal space. These effects are demonstrated in a synchrotron x-ray experiment on an As/GaAs quantum-wire array. Kinematical diffraction theory is used to describe the diffraction patterns and is found to agree very well with the experimental results.
- Received 20 February 1997
DOI:https://doi.org/10.1103/PhysRevB.55.15791
©1997 American Physical Society