Showing papers by "John B. Pendry published in 1973"
71 citations
TL;DR: In this article, the authors present a method of calculating the band structure of layer compounds that combines the transmission and reflection matrices from individual atomic layers, thus rendering the method suitable for layer compounds with complicated stacking sequences.
Abstract: We present a method of calculating the band structure of layer compounds that combines the transmission and reflection matrices from individual atomic layers. The computing time increases linearly with the number $p$ of layers in the repeat unit, compared with ${p}^{3}$ for other methods, thus rendering the method suitable for layer compounds with complicated stacking sequences. Results for Mo${\mathrm{S}}_{2}$ are described.
66 citations
TL;DR: In this paper, a system of sodium on a nickel (100) surface is described; resolution is investigated and found to be about +or-0.1 AA, while the top layer of a clean nickel surface is shown to be dilated by not more than 0.15 AA and the determination of the sodium nickel distance of 2.9 AA reported earlier by Andersson and Pendry is described in greater detail.
Abstract: The authors are concerned with extraction of structural information from LEED intensity measurements by comparison with dynamical calculations for trial structures. The technique is illustrated by the system of sodium on a nickel (100) surface. Experiments are described; resolution is investigated and found to be about +or-0.1 AA. The top layer of a clean nickel (100) surface is shown to be dilated by not more than 0.15 AA and the determination of the sodium nickel distance of 2.9 AA reported earlier by Andersson and Pendry is described in greater detail.
44 citations
TL;DR: In this article, the intrinsic surface states of transition metals have been investigated beyond the nearly free-electron model and simple conditions for the existence of surface states have been derived, and these results are presented.
Abstract: Investigations of intrinsic surface states have been generalized beyond the nearly free-electron model. Simple conditions for the existence of surface states have been derived, and these results are presented. Detailed calculations have been made for transition metals, in particular for copper, and reveal that a substantial density of surface states (i.e., \ensuremath{\sim} 1 per surface atom) is a common occurrence.
43 citations
TL;DR: In this article, it is shown how it is possible to renormalize the perturbation expansion for poles caused by strong short range scattering, and a critical test made of the renormalized scheme by calculating the correlation coefficient gsigma - sigma (r=0, t=0).
Abstract: For pt. I see abstr. A71897 of 1970. Papers showed how it is possible to renormalize the perturbation expansion for poles caused by strong short range scattering. In this paper, mathematical details of the formalism are presented and a critical test made of the renormalized scheme by calculating the correlation coefficient gsigma - sigma (r=0, t=0). Results are obtained which not only are physically reasonable in that they are positive, but which conform with other estimates of this quantity made by nonperturbative methods.
4 citations