Showing papers by "John B. Pendry published in 1970"
TL;DR: In this paper, the surface states ond-band metals are investigated by matching the crystal wave function to the outside solution at the surface, which explains the density of states anomaly seen in photoemission.
Abstract: Electron surface states ond-band metals are investigated by the method of matching the crystal wave function to the outside solution at the surface. On a (100) surface of anfcc structure such a state is found near to the crossover of thes-band and thed-band of the same symmetry. In Ni this state lies 4–5 eV below the Fermi energy, for Cu 5–6 V beloweEF. It explains the density of states anomaly seen in photoemission.
50 citations
TL;DR: In this paper, bound states and resonances of energy in the atoms of a crystal severely distort the band structure of the crystal in a systematic fashion, and the distortions extend throughout the energy range Ec to (c mod H0 mod c), though at the intermediate energies one must look far out into the complex k plane near ki approximately.
Abstract: Bound states and resonances of energy Ec in the atoms of a crystal severely distort the band structure of the crystal in a systematic fashion. The distortions extend throughout the energy range Ec to (c mod H0 mod c), though at the intermediate energies one must look far out into the complex k plane near ki approximately=(c mod H0 mod c)12/. The distortions are expected to be of importance in several surface phenomena.
19 citations
TL;DR: In this article, the spin-dependent electron-electron interaction has been shown to be spin dependent, and no divergences appearing at metallic densities are observed. But the results are restricted to the case when the electron interaction is reversed.
Abstract: A difficulty in the present perturbative schemes for calculating correlation at metallic densities is shown to be caused by a pole in the complex-coupling-constant plane entering the unit circle at e2=-e20, a consequence of the bound state which occurs when the electron-electron interaction is reversed. A remedy is proposed and applied, resulting in a renormalized interaction which is spin dependent, has no divergences appearing at metallic densities, and for which an analytic expression can be found.
5 citations