Orbital reflectometry

The occupation of d-orbitals controls the magnitude and anisotropy of the inter-atomic electron transfer in transition metal oxides and hence exerts a key influence on their chemical bonding and physical properties. Atomic-scale modulations of the orbital occupation at surfaces and interfaces are believed to be responsible for massive variations of the magnetic and transport properties, but could thus far not be probed in a quantitative manner. Here we show that it is possible to derive quantitative, spatially resolved orbital polarization profiles from soft x-ray reflectivity data, without resorting to model calculations. We demonstrate that the method is sensitive enough to resolve differences of 3 % in the occupation of Ni e_g orbitals in adjacent atomic layers of a LaNiO3-LaAlO3 superlattice, in good agreement with ab-initio electronic-structure calculations. The possibility to quantitatively correlate theory and experiment on the atomic scale opens up many new perspectives for orbital physics in d-electron materials

Review of Particle Properties, 1973

This review of the properties of leptons, mesons, and baryons is an updating of Review of Particle Properties, Particle Data Group Phys. Letters 39B, No.1 (1972). Data are evaluated, listed, averaged, and summarized in tables. A data booklet is also available

Review of Particle Properties, 1972

This review of the properties of leptons, mesons, and baryons is an updating of Review of Particle Properties, Particle Data Group [Rev. Mod. Phys. 43, No. 2, Supplement, S1 (1971)]. Data are evaluated, listed, averaged, and summarized in tables. A data booklet is also available

Review of particle properties 1975: Supplement to 1974 edition

This supplement to the 1974 edition of "Review of Particle Properties," Particle Data Group Phys. Lett. 50B, (1974), contains an announcement concerning the postponement of the usual Review, a list of Errata, and a tabulation of the experimental results on the newly discovered mesons

Review of Particle Properties, 1976

This review of the properties of leptons, mesons, and baryons is an updating of Review of Particle Properties, Particle Data Group Phys. Letters 50B, (1974), and Supplement, Rev. Mod. Phys. 47, 535 (1975). Data are evaluated, listed, averaged, and summarized in tables. Numerous tables, figures, and formulae of interest to particle physicists are also included. A data booklet is available