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Article
Circadian rhythm of some parameters of body composition in the elderly investigated by means of bioelectrical impedance analysis
We studied the within-day determinations of some body composition (BC) parameters in clinically healthy elderly subjects with the aim of investigating their circadian rhythms (CR), which are known to vary in a...
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Article
The binding energy of an adsorbed atom
We discuss the effect of substrate vibrations on the binding of an adsorbed atom. At zero temperature, we compute the binding energyD 0-E, whereD 0 is the surface well depth (class...
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Chapter
Interaction Potentials
Much of the usefulness of He scattering to surface science stems from data analysis by simple kinematics: the two-dimensional diffraction pattern from an ordered surface directly gives the reciprocal lattice v...
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Chapter
Waves on Corrugated Surfaces: K-Gaps and Enhanced Backscattering
Several unexpected phenomena involving the propagation of electromagnetic waves on corrugated surfaces arise from high-order processes in the interaction of a photon (or a surface polariton) with the surface c...
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Chapter
Theory of Helium Scattering from Surface Phonons
This is a review of the application of atom-surface scattering theory to the determination of surface phonon spectra throughout the surface Brillouin zone. It focuses on the interpretation of time-of-flight (T...
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Chapter and Conference Paper
Temperature Effects in Diffractive Atom-Surface Scattering: Perturbation Theory Formulae
The thermally-induced change in diffracted intensity is expressed in terms of the general effective (optical) potential for atom-surface diffraction. When the surface corrugation is negligible, the decrease of...
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Chapter and Conference Paper
Theory of Atom-Surface Scattering
These lectures describe the application of the quantum theory of scattering to atom-surface interaction processes. The treatment will be introductory, self-contained and fairly inclusive. A complete list of re...
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Article
A method for determining surface states by complex extension of tight binding
A method is developed for calculating surface states and the composition of the surface wave functions. The formulation is made for tight-binding Hamiltonians. The present scheme is based on the extension of t...
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Article
Impurity screening near a metal surface
The linear response of a metal to an embedded charge impurity near the surface is treated within the random phase approximation. The surface is assumed to be perfectly reflecting, which allows the boundary val...
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Article
Magnetic impurities and superconductivity below the Kondo temperature in the model of Takano and Ogawa
The behaviour of dilute metallic alloys containing magnetic impurities is examined for temperatures below the Kondo temperatureT K. A Green’s function treatment, similar to that of Takano and Ogawa, is used for t...
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Article
Dynamical screening and magnetic phases for electrons in solids
The effect of screening of the electron-electron interaction on the occurrence of static spiral spin-density waves at equilibrium is studied, with particular reference to the case of a free-electron gas embedd...
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Article
Long-wavelength modes and stability of a spin-density-wave structure in a fermi gas
The collective modes of a spiral spin-density-wave (SDW) structure are investigated in a one-dimensional model of a Fermi gas. The equations of motion in the random-phase approximation are written down in gene...
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Article
Energy-band structure of lithium atoms in the diamond lattice
A hypothetical crystal of lithium atoms in the diamond lattice is considered. The value of the energies at the special points of the reduced zone withk=(0,0,0),k=2πa −1(1,0,0),k=2πa −1(1/2, 0, 0) andk=2πa −1(1/2,...
