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This book contains keynote lectures which have been delivered at the 3rd Porquerolles' School on Surface Science, SIR2000 (Surfaces-Interfaces-Relaxation). The aim of this school was to review the main concepts necessary to understand the role of interfacial stress, strain and relaxation in crystal growth by heteroepitaxy. By bringing together scientists from various fields (physics, chemistry, materials science and engineering) which daily use complementary methodological approaches (experiment, theory, modelization), the school allowed to offer 11 multidisciplinary courses. This book addresses the state of art of stress in epitaxial materials, it describes the various methods to measure the atomic displacement and stress fields, it reviews the spectroscopic methods necessary to map the interface chemistry, it details the theoretical methods and concepts which are needed to predict them and it questions the fact that stress and relaxation can induce specific properties in magnetism, catalysis, electron transport and so on.
The field of stress and strain in heteroepitaxy has know large developments during the last ten years. New techniques have been used to set up new devices in which functionalities are obtained through structuration at a nanometer scale. Large-scale integration and reduced dimensions are the key factors to optimize the achievements of these devices. Already used in industry (quantum wells, magnetic sensors), these devices are obtained by molecular beam epitaxy, sputtering or pulsed laser deposition. Their reduced dimensionality increased the number of surfaces and interfaces, the role of which has to be precised. Experimentalists try now to associate materials having very different crystal structure and chemical composition. The elastic stress stored in the device can induce various phenomena which have to be evaluated, understood and predicted. The book intends also to show that many questions are still in debate.
Foreword. Organizers and Sponsors. Introduction (R. Kern). Some elastic effects in crystal growth (P. Müller, R. Kern). Introduction to the atomic structure of surfaces: a theoretical point of view (M.C.Desjonqueres, D. Spanjaard). Dislocations and stress relaxation in heteroepitaxial films (L. Kubin). An atomistic approach for stress relaxation in materials (G. Treglia). Ab initio study of the structural stability of thin films (A. Pastel). Stress, strain and chemical relativity: a theoretical analysis (P. Sate). Strain measurements in ultra-thin films using RHEED and X-ray techniques (B. Gilles). Measurements of displacement and strain by high resolution transmission electron microscopy (M. Hytch). Stress measurements of atomic layers and at surfaces (D. Sander). Physico-chemical analysis on a micro- and nanometer scale (N. Brun). STM spectroscopy on semiconductors (D. Stievenard). Spatially resolved surface spectroscopy (J. Cazaux).
- No. of pages:
- © Elsevier Science 2001
- 3rd July 2001
- Elsevier Science
- eBook ISBN:
CRMC2 CNRS, Campus de Luminy, 13288 Marseille Cedex 9, France
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