Observation and angular behavior of Rydberg surface resonances on W(110)

Abstract

The observation of surface resonances in the (00) beam $I-V$ curves from a W(110) surface in the [01] azimuth is reported. High-resolution low-energy electron diffraction experiments show that they form a Rydberg series converging to the ($0\overline{4}$) beam threshold. From measurements at various angles of incidence, a part of the dispersion curves of the surface resonance fringes is also obtained.