title: Time delay in the recoiling valence photoemission of ar endohedrally confined in C60.
abstract: The effects of confinement and electron correlations on the relative time delay between the 3s and 3p photoemissions of Ar confined endohedrally in C60 are investigated using the time-dependent local density approximation--a method that is also found to mostly agree with recent time delay measurements between the 3s and 3p subshells in atomic Ar. At energies in the neighborhood of 3p Cooper minimum, correlations with C60 electrons are found to induce opposite temporal effects in the emission of Ar 3p hybridized symmetrically versus that of Ar 3p hybridized antisymmetrically with C60. A recoil-type interaction model mediated by the confinement is found to best describe the phenomenon.
authors.affiliation: Center for Free-Electron Laser Science, DESY, Notkestrasse 85, 22607 Hamburg, Germany and Max Born Institute, Max-Born-Strasse 2A, 12489 Berlin, Germany.
authors.forename: Gopal
authors.initials: G
authors.lastname: Dixit
authors.forename: Himadri S
authors.initials: HS
authors.lastname: Chakraborty
authors.forename: Mohamed El-Amine
authors.initials: Mel-A
authors.lastname: Madjet