Showing papers by "John B. Pendry published in 1981"
TL;DR: In this article, the authors present a flexible theory based on a full multiple scattering cluster calculation, which can be used to extract such information in ordered, disordered and other complex systems now being studied using synchrotron radiation.
144 citations
TL;DR: In this paper, the spin polarised electron sources were used to study magnetism with the inverse photoemission (IPE) technique, with a probability related by time reversal to the excitation of an electron in angle resolved photo-emission.
Abstract: Electrons in the range 0-20 eV accelerated by the potential inside a surface emit photons over a range of frequencies, with a probability related by time reversal to the excitation of an electron in angle resolved photoemission. Theory indicates that the yield is high enough to make the experiments much simpler than photoemission, providing a more valuable probe of unoccupied electron states than any available so far. Particularly interesting is the possibility of using the new spin polarised electron sources to study magnetism with the inverse photoemission (IPE) technique.
97 citations
TL;DR: In this paper, a low-symmetry low-energy −electron-diffraction pattern observed at a fractional nitrogen-adatom coverage of 0.4 monolayer on W{001} is attributed to a structure composed of islands in which the surface-layer tungsten atoms are displaced to produce a contracted interatomic spacing.
Abstract: A low-symmetry low-energy---electron-diffraction pattern observed at a fractional nitrogen-adatom coverage of 0.4 monolayer on W{001} is attributed to a structure composed of islands in which the surface-layer tungsten atoms are displaced to produce a contracted interatomic spacing. The model correlates well with other published data for this system.
32 citations
TL;DR: In this paper, a simple theory of temperature dependence of photoemission is derived with a view to illustrating the main thermal effects, such as reduction in amplitudes of peaks due to hole state scattering and reduction in the matrix elements, and shifting of surface state peaks which the authors attribute to narrowing of the band gap within which the surface state exists.
Abstract: A simple theory of temperature dependence of photoemission is derived with a view to illustrating the main thermal effects. These prove to be: reduction in amplitudes of peaks due to hole state scattering and reduction in the matrix elements, and the shifting of surface state peaks which the authors attribute to narrowing of the band gap within which the surface state exists. Scattering of the escaping electron is relatively unimportant.
24 citations
TL;DR: In this paper, the loss intensities for the inelastic scattering of low-energy electrons with one-quantum energy loss to the adsorbate vibrations are reported, and the relevant T-matrix element is computed using LEED wavefunctions for the familiar muffin-tin potential model.
Abstract: Calculations are reported of the loss intensities for the inelastic scattering of low-energy electrons with one-quantum energy loss to the adsorbate vibrations. The relevant T-matrix element is computed using LEED wavefunctions for the familiar muffin-tin potential model, so only the impact scattering is calculated. This is the dominant scattering away from specular, and scattering angle-resolved loss intensities for both perpendicular, and parallel adsorbate vibrations are presented. These angular dependences show a wealth of structure, but although the experimental data is scanty, not all of it can be reproduced.
23 citations
01 Jan 1981
TL;DR: In this article, the concept of a surface state is discussed in terms of trapping by repeated reflection from the crystal and surface barrier, and the notion of incomplete orbitals is introduced in the context of bonding to metal surfaces.
Abstract: The concept of a surface state is discussed in terms of trapping by repeated reflection from the crystal and surface barrier. Surface states play the role of “dangling bonds” on semiconductors but not on metals. The notion of incomplete orbitals is introduced in the context of bonding to metal surfaces. Finally an extended discussion is made of photoemission, its information content and surface sensitivity, several examples being presented.
6 citations
TL;DR: As one of the part of book categories, tripping the light fantastic always becomes the most wanted book.
Abstract: If you really want to be smarter, reading can be one of the lots ways to evoke and realize. Many people who like reading will have more knowledge and experiences. Reading can be a way to gain information from economics, politics, science, fiction, literature, religion, and many others. As one of the part of book categories, tripping the light fantastic always becomes the most wanted book. Many people are absolutely searching for this book. It means that many love to read this kind of book.
2 citations
TL;DR: In this article, an expression for the integral of the density of states, rho (r, E), over an arbitrary volume in terms of the Green's function of the medium, its energy and spatial derivatives, evaluated on the surface of the volume.
Abstract: An expression is found for the integral of the density of states, rho (r, E), over an arbitrary volume in terms of the Green's function of the medium, its energy and spatial derivatives, evaluated on the surface of the volume. It is also possible, within the rigid muffin-tin approximation, to express the phonon energies in terms of similar functions.
1 citations