Volume 57, Number 4, February 2002
|Page(s)||499 - 505|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 September 2002|
Grazing-incidence diffraction anomalous fine structure of self-assembled quantum wires
Laboratoire de Cristallographie, CNRS - B.P. 166, 38042
Grenoble Cedex 09, France
2 Departamento de Física de la Materia Condensada, Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza - c. Pedro Cerbuna 12, 50009 Zaragoza, Spain
3 Instituto de Microelectrónica de Madrid, CSIC c. Isaac Newton 8, 28760 Tres Cantos, Spain
Accepted: 20 November 2001
We have studied nanostructured samples of InAs/InP(001) by means of Grazing Incidence Diffraction Anomalous Fine Structure. The samples, grown by molecular beam epitaxy, show a periodic corrugation on the surface giving rise to an array of self-assembled quantum wires after deposition of 2.5 monolayers of InAs. We measured the (440) and (420) GIDAFS spectra, at the As K-edge, at incidence and outgoing angles close to the substrate's critical angle. We analysed the anomalous diffraction lineshapes vs. the energy, as well as the oscillatory part of the signal in the extended region above the edge and obtained, for the first time, information about composition and strain inside the quantum wires and close to the interface. Our results suggest possible interfaces.
PACS: 61.10.-i – X-ray diffraction and scattering / 61.10.Ht – X-ray absorption spectroscopy: EXAFS, NEXAFS, XANES, etc / 68.65.-k – Low-dimensional, mesoscopic, and nanoscale systems: structure and nonelectronic properties
© EDP Sciences, 2002
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.