Dynamics of Gas-Surface Interaction: Proceedings of the International School on Material Science and Technology, Erice, Italy, July 1-15, 1981 - Softcover

Inhaltsangabe

I. Scattering of Atoms from Solid Surfaces.- Theory of Atom-Surface Scattering.- 1. Lecture I.- 1.1 Scattering from a Periodic Potential.- 1.2 Numerical Methods and Phase Shifts.- 1.3 Close Coupling Calculations.- 1.4 The Distorted Wave Born Approximation.- 2. Lecture II.- 2.1 Formal Scattering Theory.- 2.2 Partial Processes.- 3. Lecture III.- 3.1 Semiclassical Methods.- 3.2 Scattering from a Hard Corrugated Surface (HCS).- 3.3 Eikonal and Kirchoff Approximations.- 4. Lecture IV.- 4.1 Introduction.- 4.2 Kinematics.- 4.3 Resonant Scattering Formalism.- 4.4 Resonance Line Shapes.- References.- He Diffraction from Semiconductor Surfaces. Lecture I: Si(100).- 1. Introduction.- 2. Si (100): Disordered Dimer Array.- 2.1 Si(100) Periodicity.- 2.2 Diffraction Scans and a Qualitative Feature of the Si(100) Surface.- 2.3 Specular Intensities.- 3. Structural Models for Si(100).- References.- He Diffraction from Semiconductor Surfaces. Lecture II: CaAs(110): Calibration of the Atom-Diffraction Technique.- 1. Introduction.- 2. Diffracti on Scans.- 3. Specular Intensity Scans.- 4. Rigorous Calculation of Diffraction Intensities.- 5. The Origin of the He/GaAs Potential.- 6. Computation of Rarefied Charge Densities.- 7. Summary.- References.- He Diffraction from Semiconductor Surfaces. Lecture III: Si (111) 7×7.- 1. Introduction.- 2. Diffraction Scans.- 3. Specular Intensity Interference.- 4. A Model of the Si(111) 7×7.- 5. Summary.- References.- Helium Scattering from Clean and Adsorbate-Covered Metal Surfaces.- 1. Introduction.- 2. The He-Surface Interaction Potential and the Crystallographic Information Contained in the Corrugation Function.- 3. Data Analysis.- 3.1 Diffraction Geometry.- 3.2 The Hard Corrugated Wall Model.- 3.3 Calculation of Intensities for Given ?(R): The Direct Problem.- 3.4 Reconstruction of the Corrugation Function from Measured and Intensities: the Inverse Problem.- 3.5 Influences due to the Softness of the Potential.- 3.6 Influences due to the Thermal Motion of the Surface Atoms.- 4. Experimental Aspects.- 5. Examples.- 5.1 Metals.- 5.2 Adsorbate Structures.- References.- The Coherence Length in Molecular and Electron Beam Diffraction.- 1. Abstract.- 2. Introduction.- 3. The Formation of the Diffraction Pattern.- 3.1 The Simple-Minded Approach.- 3.2 The Rigorous Approach.- 4. Summary.- References.- Charge Density Waves Surface Deformation Studied by Helium Atom Diffraction.- 1. Introduction.- 2. Unreconstructed Structure of the Layered Compounds.- 3. Charge Density Waves Deformations.- References.- II. Characterization of Adsorbed Phases.- Phase Transitions in Surface Films.- 1. Introduction.- 2. Order-Disorder Transitions.- 2.1 Critical Exponents and Surface Symmetry.- 2.2 2D Gas-Solid Transition.- 2.3 2D Melting (Existence of a Self-Bound Liquid?).- 2.3.1 Mehtane/Graphite.- 2.3.2 Krypton/Graphite.- 3. Solid-State Transformation.- 3.1 Commensurate-Incommensurate (C-I) Transition.- 3.1.1 Kr/Graphite (0001).- 3.1.2 Xe/Cu(110).- 3.2 2D Polymorphism.- 3.3 Non Stoichiometric Surface Compounds.- 4. 2D Gas-Liquid Transition.- 4.1 Liquid-Gas Coexistence.- 4.2 Critical Index.- 5. Influence of Heterogeneities on Surface Phase Transitions.- 6. Conclusions.- References.- Universal Laws of Physical Adsorption.- 1. Introduction.- 2. Evidence for Universality.- 3. Analytical Forms of the Potential.- 4. Conclusion.- References.- The Dynamical Parameters of Desorbing Molecules.- 1. Abstract.- 2. Introduction.- 3. The Failure of the General Desorption Laws.- 4. The Associative Desorption of Permeating Atoms.- 5. Conclusions.- References.- Atomic Beam Diffraction as a Method for Studying Two-Dimensional Solids.- 1. Introduction.- 2. Atomic Diffraction.- 2.1 Surface Crystallography.- 2.2 Atom-Surface Interaction Potential.- 2.3 Inelastic Scattering.- 3. Atomic Diffraction from Adsorbates.- 4. Diffraction of H Atoms from a Xe Overlayer Adsorbed on the (0001) Surface of Graphite.- 5. Conclusions.- References.- Atom Scattering from

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